Electric Resistance and Simple Circuits | Physics JEE previous year questions with Solutions

Q 1 :

In the given circuit, the terminal potential difference of the cell is [2024]

4 V
2 V
3 V
1.5 V

1

2

3

4

(2)

Current supplied by battery, $i = \frac{3}{1 + 2} = 1 A$

The terminal potential difference of the cell

$V = E - i r = 3 - 1 \times 1 = 2 V$

Q 2 :

A potential divider circuit is shown in figure. The output voltage $V_{0}$ is [2024]

4 V
2 mV
0.5 V
12 mV

1

2

3

4

(3)

$R_{eq} = 4000 Ω$

$i = \frac{4}{4000} = \frac{1}{1000} A$

$V_{0} = (i) (500 Ω)$

$= \frac{1}{1000} \times 500 = 0.5 volt$

Q 3 :

The reading in the ideal voltmeter (V) shown in the given circuit diagram is [2024]

5 V
10 V
0 V
3 V

1

2

3

4

(3)

$i = \frac{E_{eq}}{r_{eq}} = \frac{8 \times 5}{8 \times 0.2}$

$I = 25 A$

Reading of Voltmeter $V = E - i r = 5 - 0.2 \times 25 = 0$

Q 4 :

A galvanometer (G) of 2 $Ω$ resistance is connected in the given circuit. The ratio of charge stored in $C_{1}$ and $C_{2}$ is [2024]

$\frac{2}{3}$
$\frac{3}{2}$
$1$
$\frac{1}{2}$

1

2

3

4

(4)

Resistance $R = 12 Ω$

Current $i = \frac{6}{12} = \frac{1}{2} A$

$\frac{q_{4 μ F}}{q_{6 μ F}} = \frac{4 \times 10^{- 6} \times 3}{6 \times 10^{- 6} \times 4} = \frac{1}{2}$

Q 5 :

The current flowing through the $1 Ω$ resistor is $\frac{n}{10}$ A. The value of $n$ is ______ . [2024]

(25)

At junction $y$ ,

$\frac{y - 5}{2} + \frac{y - 0}{2} + \frac{y - (x - 10)}{1} = 0$

$y - 5 + x + 3 x - 40 - 4 y = 0$

$4 y - 2 x + 15 = 0$ ...(i)

At junction $x,$ $\frac{x - 5}{4} + \frac{x - 0}{4} + \frac{(x - 10) - y}{1} = 0$

$x - 5 + x + 4 x - 40 + 4 y = 0$

$6 x - 4 y - 45 = 0$ ...(ii)

$x = \frac{15}{2} V and y = 0$

$i_{1} = \frac{y - (x - 10)}{1} = \frac{0 - 7.5 + 10}{1}$

$\Rightarrow i_{1} = 2.5 A = \frac{n}{10} A \Rightarrow n = 25$

Q 6 :

Two cells are connected in opposition as shown. Cell $E_{1}$ is of 8 V emf and $2 Ω$ internal resistance; the cell $E_{2}$ is of 2 V emf and $4 Ω$ internal resistance. The terminal potential difference of cell $E_{2}$ is ____ V. [2024]

(6)

$r_{eq} = r_{1} + r_{2} = (2 + 4) Ω = 6 Ω$

Current in the loop, $i = \frac{ε_{eq}}{r_{eq}} = \frac{6 V}{6 Ω} = 1 A$

Terminal potential difference of cell $E_{2} \Rightarrow E_{2} + i r_{2}$

$\Rightarrow [2 + (1) (4)] V \Rightarrow 6 V$

Q 7 :

Given below are two statements:

Statement-I : The equivalent emf of two nonideal batteries connected in parallel is smaller than either of the two emfs.

Statement-II : The equivalent internal resistance of two nonideal batteries connected in parallel is smaller than the internal resistance of either ofthe two batteries.

In the light of the above statements, choose the correct answer from the options given below. [2025]

Statement-I is true but Statement-II is false
Both Statement-I and Stratement-II are false
Both Statement-I and Statement-II are true
Statement-I is false but Statement-II is true

1

2

3

4

(4)

In parallel connections,

$\frac{1}{r_{eq}} = \frac{1}{r_{1}} + \frac{1}{r_{2}} and \frac{E_{eq}}{r_{eq}} = \frac{E_{1}}{r_{1}} + \frac{E_{2}}{r_{2}}$

If $E_{1} = E_{2} and r_{1} = r_{2}$

$∴$ Statement-I is false.

$r_{eq}$ is less than both $r_{1}$ and $r_{2}$

$∴$ Statement -II is true.

Q 8 :

The value of current $I$ in the electrical circuit as given below, when potential at A is equal to the potential at B, will be ______ A. [2025]

(2)

$V_{A} = V_{B} \Rightarrow$ the bridge is balanced

$\Rightarrow \frac{10}{R} = \frac{20}{40} \Rightarrow R = 20 Ω$

$\Rightarrow I = \frac{40}{20} = 2 A$

Q 9 :

In the figure shown below, a resistance of 150.4 $Ω$ is connected in series to an ammeter A of resistance 240 $Ω$ . A shunt resistance of 10 $Ω$ is connected in parallel with the ammeter. The reading of the ammeter is ______ mA. [2025]

(5)

$R_{eq} = R_{1} + R_{2}$

$R_{eq} = 150.4 + \frac{240 \times 10}{250}$

$= 150.4 + 9.6 = 160 Ω$

$I_{1} = \frac{I R_{2}}{240} = \frac{I \times 9.6}{240}$

$= \frac{20}{160} \times \frac{96}{2400} = \frac{1}{200} A$

$= 5 \times 10^{- 3} A = 5 mA$

Q 10 :

Two cells of emf 1 V and 2 V and internal resistance 2 $Ω$ and 1 $Ω$ , respectively, are connected in series with an external resistance of 6 $Ω$ . The total current in the circuit is $I_{1}$ . Now the same two cells in parallel configuration are connected to same external resistance. In this case, the total current drawn is $I_{2}$ . The value of $(\frac{I_{1}}{I_{2}})$ is $\frac{X}{3}$ . The value of X is _________. [2025]

(4)

$I_{1} = \frac{ε_{1} + ε_{2}}{r_{1} + r_{2} + R} = \frac{1 + 2}{2 + 1 + 6} = \frac{3}{9} = \frac{1}{3} A$

$ε_{eq} = \frac{\frac{ε_{1}}{r_{1}} + \frac{ε_{2}}{r_{2}}}{\frac{1}{r_{1}} + \frac{1}{r_{2}}} = \frac{\frac{1}{2} + \frac{2}{1}}{\frac{1}{2} + \frac{1}{1}} = \frac{5}{3} V$

$r_{eq} = \frac{r_{1} r_{2}}{r_{1} + r_{2}} + R = \frac{2 \times 1}{3} + 6 = \frac{20}{3} Ω$

$I_{2} = \frac{ε_{eq}}{r_{eq}} = \frac{\frac{5}{3}}{\frac{20}{3}} = \frac{1}{4} A$

$\Rightarrow \frac{I_{1}}{I_{2}} = \frac{1}{3} \times \frac{4}{1} = \frac{4}{3}$

Q 11 :

Figure shows a part of an electric circuit. The potentials at points a, b and c are 30 V, 12 V and 2 V respectively. The current through the 20 $Ω$ resistor will be. [2023]

0.4 A
0.2 A
0.6 A
1.0 A

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2

3

4

(1)

Sum of current at junction point will be zero:

$\frac{x - 30}{10} + \frac{x - 12}{20} + \frac{x - 2}{30} = 0$

$\Rightarrow x (\frac{1}{10} + \frac{1}{20} + \frac{1}{30}) = \frac{30}{10} + \frac{12}{20} + \frac{2}{30}$

$\Rightarrow x (\frac{6 + 3 + 2}{60}) = \frac{180 + 36 + 4}{60}$

$\Rightarrow x = \frac{220}{11} = 20 V$

$∴$ $Current through 20 Ω, I_{20 Ω} = \frac{x - 12}{20}$

$\Rightarrow I_{20 Ω} = \frac{20 - 12}{20} = \frac{2}{5} = 0.4 A$

Q 12 :

In this figure the resistance of the coil of galvanometer $G$ is $2 Ω$ . The emf of the cell is 4 V. The ratio of potential difference across $C_{1}$ and $C_{2}$ is [2023]

$\frac{5}{4}$
$1$
$\frac{3}{4}$
$\frac{4}{5}$

1

2

3

4

(4)

$At steady state, current in the circuit is$

$i = \frac{4 V}{6 + 2 + 8} = \frac{1}{4} A$

$Voltage across C_{1} is$

$V_{1} = V_{A C} = i (6 Ω + 2 Ω) = \frac{1}{4} \times 8 = 2 V$

$Voltage across C_{2} is$

$V_{2} = V_{B D} = i (2 Ω + 8 Ω) = \frac{1}{4} \times 10 = 2.5 V$

$\Rightarrow \frac{V_{1}}{V_{2}} = \frac{2}{2.5} = \frac{4}{5}$

Q 13 :

The current flowing through $R_{2}$ is [2023]

$\frac{2}{3} A$
$\frac{1}{4} A$
$\frac{1}{2} A$
$\frac{1}{3} A$

1

2

3

4

(4)

$R_{eq} = 4 Ω$

$i = \frac{8}{4} = 2 A$

$i_{1} = \frac{2 \times 3}{3 + 6} = \frac{2}{3} A$

$i_{2} = \frac{2 / 3}{2} = \frac{1}{3} A$

Q 14 :

In the following circuit, the magnitude of current $I_{1},$ is _______ A. [2023]

(1.5)

Junction law at A,

$\frac{x - (y + 5)}{1} + \frac{x - 2}{2} + \frac{x - 0}{2} = 0$ ...(i)

Junction law at B,

$\frac{y + 5 - x}{1} + \frac{y - 0}{1} + \frac{y - 2}{1} = 0$ ...(ii)

On solving equation (i) and equation (ii),

$x = 3 and y = 0$

$At D junction, I_{1} = i_{1} + i_{2}$

$I_{1} = \frac{y - 0}{1} + \frac{x - 0}{2} = \frac{0 - 0}{1} + \frac{3 - 0}{2}$

$\Rightarrow I_{1} = 1.5 A$

Q 15 :

Two identical cells, when connected either in parallel or in series, give the same current in an external resistance $5 Ω$ . The internal resistance of each cell will be _____ $Ω$ . [2023]

(5)

$\frac{ε}{r + 5} \times 5 = 200 x$ ...(i)

$\frac{ε \times 15}{r + 15} = 300 x$ ...(ii)

$\Rightarrow r = 5 Ω$

Q 16 :

In the given circuit, the value of $| \frac{I_{1} + I_{3}}{I_{2}} |$ is __________ . [2023]

(2)

$I_{1} = I_{2} = \frac{20 - 10}{10} = 1 A$

$I_{3} = 1 A \Rightarrow$ $| \frac{I_{1} + I_{3}}{I_{2}} |$ $= 2$

Q 17 :

Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal resistance of 3 $Ω$ . Cell 2 has emf of 6 V and internal resistance of 6 $Ω$ . An external resistor R of 4 $Ω$ is connected across A and B. The current flowing through R will be __________ A. [2023]

(1)

$E_{eq} = \frac{\frac{12}{3} - \frac{6}{6}}{\frac{1}{3} + \frac{1}{6}} = 6 V$

$R_{eq} = 2 Ω and R = 4 Ω$

$So, i = \frac{6}{2 + 4} = 1 A$

Q 18 :

In the circuit diagram shown in the figure given below, the current flowing through resistance $3 Ω$ is $\frac{x}{3} A$ . The value of $x$ is ________. [2023]

(1)

$E = E_{2} - E_{1} = 8 - 4 = 4 V$

$\frac{1}{3} + \frac{1}{6} = \frac{1}{2} = \frac{1}{R}$

$\Rightarrow R = 2 Ω$

$The current supplied by battery E,$

$I = \frac{E}{1.5 + 4.5 + 2} = \frac{4}{8} = 0.5 A$

$Hence current in 3 Ω resistance,$

$I_{1} = (\frac{6}{3 + 6}) \times 0.5 = \frac{1}{3} A$

$\Rightarrow I_{1} = \frac{x}{3} = \frac{1}{3}$

$∴$ $x = 1$

Q 19 :

Two identical cells each of emf 1.5 V are connected in series across a 10 $Ω$ resistance. An ideal voltmeter connected across the 10 $Ω$ resistance reads 1.5 V. The internal resistance of each cell is __________ $Ω$ . [2023]

(5)

$V = 1 \times 10$

$1.5 = (\frac{3}{10 + 2 r}) \times 10$

$r = 5 Ω$

Q 20 :

In the circuit shown, the energy stored in the capacitor is $n μ J$ . The value of $n$ is _______. [2023]

(75)

$I_{1} = \frac{12}{3 + 9} = 1 A$

$I_{2} = \frac{12}{4 + 2} = 2 A$

$V_{A} - V_{C} = 3 I_{1} = 3 V$ ...(i)

$V_{A} - V_{D} = 2 \times 4 = 8 V$ ...(ii)

Subtracting eq. (i) from eq. (ii),

$V_{C} - V_{D} = 5 V \Rightarrow V = 5 V$

$U = \frac{1}{2} C V^{2} = \frac{1}{2} \times 6 \times 5^{2} = 75 μ J$

Q 21 :

A network of four resistances is connected to a 9 V battery, as shown in the figure. The magnitude of voltage difference between the points A and B is __________ V. [2023]

(3)

$In the circuit, I = \frac{9}{3} = 3 A$

$V_{C} - V_{A} = 2 \times 1.5 = 3$ ...(i)

$V_{C} - V_{B} = 4 \times 1.5 = 6$ ...(ii)

Equation (ii) - Equation (i)

$V_{A} - V_{B} = 6 - 3 = 3 V$

Q 22 :

Two resistors $2 Ω$ and $3 Ω$ are connected in the gaps of a bridge as shown in the figure. The null point is obtained with the contact of jockey at some point on wire XY. When an unknown resistor is connected in parallel with $3 Ω$ resistor, the null point is shifted by 22.5 cm toward Y. The resistance of the unknown resistor is _____ $Ω$ . [2026]

1
4
3
2

1

2

3

4

(4)

$Initially, \frac{2}{3} = \frac{x}{100 - x}$

$\Rightarrow x = 40 cm$

$Now when R connected in parallel$

$\frac{2}{\frac{3 R}{3 + R}} = \frac{40 + 22.5}{60 - 22.5} = \frac{62.5}{37.5}$

$∴$ $R = 2 Ω$

Q 23 :

Two resistors of $100 Ω$ each are connected in series with a 9 V battery. A voltmeter of $400 Ω$ resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is ________ V. [2026]

4
3
2
4.5

1

2

3

4

(1)

$Current in circuit$

$I = \frac{E}{R_{eq}}$

$R_{eq} = 100 + \frac{400 \times 100}{400 + 100} = 180 Ω$

$∴$ $I = \frac{9}{180} = \frac{1}{20} A$

$Reading of voltmeter = V = I \times 80 = \frac{1}{20} \times 80 = 4 V$

Q 24 :

A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances $(R_{1} = R_{2} = R_{3} = R_{4})$ When $R_{3}$ resistance is heated to some temperature, its resistance value has gone up by 10% The potential difference $(V_{a} - V_{b})$ (after $R_{3}$ is heated) is ______ V. [2026]

0.95
2
0
1.06

1

2

3

4

(1)

$V_{A} = \frac{V}{2}$

$V_{B} = \frac{V}{2 \cdot I_{R}} \times R = \frac{V}{2.1}$

$∴$ $V_{A} - V_{B} = V [\frac{1}{2} - \frac{1}{2.1}]$

$V_{A} - V_{B} = \frac{0.1}{2 \times 2.1} \times 40$

$V_{A} - V_{B} = \frac{4}{4.2} = 0.95$

Q 25 :

A battery with EMF E and internal resistance r is connected across a resistance R. The power consumption in R will be maximum when: [2026]

R = r
R = 2r
R = r/2
$R = \sqrt{2} r$

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2

3

4

(1)

$For maximum power drawn across load$

$Resistance R_{Load} = R_{internal}$

$R = r$

Q 26 :

For the two cells having same EMF E and internal resistance r, the current passing through the external resistor $6 Ω$ is same when both the cells are connected either in parallel or in series. The value of internal resistance r is ______ $Ω .$ [2026]

6
9
3
4

1

2

3

4

(1)

$In series, i_{1} = \frac{2 E}{6 + 2 r}$

$In parallel, i_{2} = \frac{E}{6 + \frac{r}{2}}$

$i_{1} = i_{2} \Rightarrow \frac{2 E}{6 + 2 r} = \frac{E}{6 + \frac{r}{2}}$

$12 + r = 6 + 2 r$

$r = 6 Ω$

Topic Question Set

Q 1 :

In the given circuit, the terminal potential difference of the cell is [2024]

Q 2 :

A potential divider circuit is shown in figure. The output voltage $V_{0}$ is [2024]

Q 3 :

The reading in the ideal voltmeter (V) shown in the given circuit diagram is [2024]

Q 4 :

A galvanometer (G) of 2 $Ω$ resistance is connected in the given circuit. The ratio of charge stored in $C_{1}$ and $C_{2}$ is [2024]

Q 5 :

The current flowing through the $1 Ω$ resistor is $\frac{n}{10}$ A. The value of $n$ is ______ . [2024]

Q 6 :

Two cells are connected in opposition as shown. Cell $E_{1}$ is of 8 V emf and $2 Ω$ internal resistance; the cell $E_{2}$ is of 2 V emf and $4 Ω$ internal resistance. The terminal potential difference of cell $E_{2}$ is ____ V. [2024]

Q 8 :

The value of current $I$ in the electrical circuit as given below, when potential at A is equal to the potential at B, will be ______ A. [2025]

Q 9 :

In the figure shown below, a resistance of 150.4 $Ω$ is connected in series to an ammeter A of resistance 240 $Ω$ . A shunt resistance of 10 $Ω$ is connected in parallel with the ammeter. The reading of the ammeter is ______ mA. [2025]

Q 11 :

Figure shows a part of an electric circuit. The potentials at points a, b and c are 30 V, 12 V and 2 V respectively. The current through the 20 $Ω$ resistor will be. [2023]

Q 12 :

In this figure the resistance of the coil of galvanometer $G$ is $2 Ω$ . The emf of the cell is 4 V. The ratio of potential difference across $C_{1}$ and $C_{2}$ is [2023]

Q 13 :

The current flowing through $R_{2}$ is [2023]

Q 14 :

In the following circuit, the magnitude of current $I_{1},$ is _______ A. [2023]

Q 15 :

Two identical cells, when connected either in parallel or in series, give the same current in an external resistance $5 Ω$ . The internal resistance of each cell will be _____ $Ω$ . [2023]

Q 16 :

In the given circuit, the value of $| \frac{I_{1} + I_{3}}{I_{2}} |$ is __________ . [2023]

Q 18 :

In the circuit diagram shown in the figure given below, the current flowing through resistance $3 Ω$ is $\frac{x}{3} A$ . The value of $x$ is ________. [2023]

Q 19 :

Two identical cells each of emf 1.5 V are connected in series across a 10 $Ω$ resistance. An ideal voltmeter connected across the 10 $Ω$ resistance reads 1.5 V. The internal resistance of each cell is __________ $Ω$ . [2023]

Q 20 :

In the circuit shown, the energy stored in the capacitor is $n μ J$ . The value of $n$ is _______. [2023]

Q 21 :

A network of four resistances is connected to a 9 V battery, as shown in the figure. The magnitude of voltage difference between the points A and B is __________ V. [2023]

Q 23 :

Two resistors of $100 Ω$ each are connected in series with a 9 V battery. A voltmeter of $400 Ω$ resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is ________ V. [2026]

Q 25 :

A battery with EMF E and internal resistance r is connected across a resistance R. The power consumption in R will be maximum when: [2026]

Q 26 :

For the two cells having same EMF E and internal resistance r, the current passing through the external resistor $6 Ω$ is same when both the cells are connected either in parallel or in series. The value of internal resistance r is ______ $Ω .$ [2026]

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Topic Question Set

Q 1 : In the given circuit, the terminal potential difference of the cell is [2024]

Q 2 : A potential divider circuit is shown in figure. The output voltage V0 is [2024]

Q 3 : The reading in the ideal voltmeter (V) shown in the given circuit diagram is [2024]

Q 4 : A galvanometer (G) of 2Ω resistance is connected in the given circuit. The ratio of charge stored in C1 and C2 is [2024]

Q 5 : The current flowing through the 1Ω resistor is n10A. The value of n is ______ . [2024]

Q 6 : Two cells are connected in opposition as shown. Cell E1 is of 8 V emf and 2Ω internal resistance; the cell E2 is of 2 V emf and 4Ω internal resistance. The terminal potential difference of cell E2 is ____ V. [2024]

Q 8 : The value of current I in the electrical circuit as given below, when potential at A is equal to the potential at B, will be ______ A. [2025]

Q 9 : In the figure shown below, a resistance of 150.4Ω is connected in series to an ammeter A of resistance 240Ω. A shunt resistance of 10Ω is connected in parallel with the ammeter. The reading of the ammeter is ______ mA. [2025]

Q 11 : Figure shows a part of an electric circuit. The potentials at points a, b and c are 30 V, 12 V and 2 V respectively. The current through the 20Ω resistor will be. [2023]

Q 12 : In this figure the resistance of the coil of galvanometer G is 2 Ω. The emf of the cell is 4 V. The ratio of potential difference across C1 and C2 is [2023]

Q 13 : The current flowing through R2 is [2023]

Q 14 : In the following circuit, the magnitude of current I1, is _______ A. [2023]

Q 15 : Two identical cells, when connected either in parallel or in series, give the same current in an external resistance 5 Ω. The internal resistance of each cell will be _____ Ω. [2023]

Q 16 : In the given circuit, the value of |I1+I3I2| is __________ . [2023]

Q 17 : Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal resistance of 3Ω. Cell 2 has emf of 6 V and internal resistance of 6Ω. An external resistor R of 4Ω is connected across A and B. The current flowing through R will be __________ A. [2023]

Q 18 : In the circuit diagram shown in the figure given below, the current flowing through resistance 3 Ω is x3 A. The value of x is ________. [2023]

Q 19 : Two identical cells each of emf 1.5 V are connected in series across a 10Ω resistance. An ideal voltmeter connected across the 10Ω resistance reads 1.5 V. The internal resistance of each cell is __________ Ω. [2023]

Q 20 : In the circuit shown, the energy stored in the capacitor is n μJ. The value of n is _______. [2023]

Q 21 : A network of four resistances is connected to a 9 V battery, as shown in the figure. The magnitude of voltage difference between the points A and B is __________ V. [2023]

Q 23 : Two resistors of 100 Ω each are connected in series with a 9 V battery. A voltmeter of 400 Ω resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is ________ V. [2026]

Q 24 : A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances (R1=R2=R3=R4) When R3 resistance is heated to some temperature, its resistance value has gone up by 10% The potential difference (Va-Vb) (after R3 is heated) is ______ V. [2026]

Q 25 : A battery with EMF E and internal resistance r is connected across a resistance R. The power consumption in R will be maximum when: [2026]

Q 26 : For the two cells having same EMF E and internal resistance r, the current passing through the external resistor 6Ω is same when both the cells are connected either in parallel or in series. The value of internal resistance r is ______ Ω. [2026]

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Q 1 :

In the given circuit, the terminal potential difference of the cell is [2024]

Q 2 :

A potential divider circuit is shown in figure. The output voltage $V_{0}$ is [2024]

Q 3 :

The reading in the ideal voltmeter (V) shown in the given circuit diagram is [2024]

Q 4 :

A galvanometer (G) of 2 $Ω$ resistance is connected in the given circuit. The ratio of charge stored in $C_{1}$ and $C_{2}$ is [2024]

Q 5 :

The current flowing through the $1 Ω$ resistor is $\frac{n}{10}$ A. The value of $n$ is ______ . [2024]

Q 6 :

Two cells are connected in opposition as shown. Cell $E_{1}$ is of 8 V emf and $2 Ω$ internal resistance; the cell $E_{2}$ is of 2 V emf and $4 Ω$ internal resistance. The terminal potential difference of cell $E_{2}$ is ____ V. [2024]

Q 8 :

The value of current $I$ in the electrical circuit as given below, when potential at A is equal to the potential at B, will be ______ A. [2025]

Q 9 :

In the figure shown below, a resistance of 150.4 $Ω$ is connected in series to an ammeter A of resistance 240 $Ω$ . A shunt resistance of 10 $Ω$ is connected in parallel with the ammeter. The reading of the ammeter is ______ mA. [2025]

Q 11 :

Figure shows a part of an electric circuit. The potentials at points a, b and c are 30 V, 12 V and 2 V respectively. The current through the 20 $Ω$ resistor will be. [2023]

Q 12 :

In this figure the resistance of the coil of galvanometer $G$ is $2 Ω$ . The emf of the cell is 4 V. The ratio of potential difference across $C_{1}$ and $C_{2}$ is [2023]

Q 13 :

The current flowing through $R_{2}$ is [2023]

Q 14 :

In the following circuit, the magnitude of current $I_{1},$ is _______ A. [2023]

Q 15 :

Two identical cells, when connected either in parallel or in series, give the same current in an external resistance $5 Ω$ . The internal resistance of each cell will be _____ $Ω$ . [2023]

Q 16 :

In the given circuit, the value of $| \frac{I_{1} + I_{3}}{I_{2}} |$ is __________ . [2023]

Q 18 :

In the circuit diagram shown in the figure given below, the current flowing through resistance $3 Ω$ is $\frac{x}{3} A$ . The value of $x$ is ________. [2023]

Q 19 :

Two identical cells each of emf 1.5 V are connected in series across a 10 $Ω$ resistance. An ideal voltmeter connected across the 10 $Ω$ resistance reads 1.5 V. The internal resistance of each cell is __________ $Ω$ . [2023]

Q 20 :

In the circuit shown, the energy stored in the capacitor is $n μ J$ . The value of $n$ is _______. [2023]

Q 21 :

A network of four resistances is connected to a 9 V battery, as shown in the figure. The magnitude of voltage difference between the points A and B is __________ V. [2023]

Q 23 :

Two resistors of $100 Ω$ each are connected in series with a 9 V battery. A voltmeter of $400 Ω$ resistance is connected to measure the voltage drop across one of the resistors. The voltmeter reading is ________ V. [2026]

Q 25 :

A battery with EMF E and internal resistance r is connected across a resistance R. The power consumption in R will be maximum when: [2026]

Q 26 :

For the two cells having same EMF E and internal resistance r, the current passing through the external resistor $6 Ω$ is same when both the cells are connected either in parallel or in series. The value of internal resistance r is ______ $Ω .$ [2026]