Q 1 :    

Read the passage given below and answer the following questions from (i) to (v).

Ohm’s law is the relationship between potential difference and current in a circuit which was first established by George Simon Ohm. The law states that the current passing through a metallic conductor is directly proportional to the potential difference applied between its ends. $V\propto I i.e., V=kI$  Where k is the resistance offered by the conductor and is constant for a given conductor. Although a large class of materials is known to follow Ohm’s law, there do exist materials used in circuits that do not follow the direct relationship between V & I.

 

(i) If in a circuit both the potential difference and resistance are doubled, then:

• current is doubled.

   

• current is halved.

   

• current remains same.

   

• current is four times.

   

Q 2 :    

Read the passage given below and answer the following questions from (i) to (v).

Ohm’s law is the relationship between potential difference and current in a circuit which was first established by George Simon Ohm. The law states that the current passing through a metallic conductor is directly proportional to the potential difference applied between its ends.   Where k is the resistance offered by the conductor and is constant for a given conductor. Although a large class of materials is known to follow Ohm’s law, there do exist materials used in circuits that do not follow the direct relationship between V & I.

 

(ii) When a battery of 9 V is connected across a conductor and the current flowing is 0.1 A, the resistance is:

• $90 \Omega$

   

• $0.9 \Omega$

   

• $9 \Omega$

   

• $900 \Omega$

   

Q 3 :    

Read the passage given below and answer the following questions from (i) to (v).

Ohm’s law is the relationship between potential difference and current in a circuit which was first established by George Simon Ohm. The law states that the current passing through a metallic conductor is directly proportional to the potential difference applied between its ends.   Where k is the resistance offered by the conductor and is constant for a given conductor. Although a large class of materials is known to follow Ohm’s law, there do exist materials used in circuits that do not follow the direct relationship between V & I.

 

(iii) By increasing voltage across a conductor:

• current will increase.

   

• current will decrease.

   

• resistance will decrease.

   

• resistance will increase.

   

Q 4 :    

Read the passage given below and answer the following questions from (i) to (v).

Ohm’s law is the relationship between potential difference and current in a circuit which was first established by George Simon Ohm. The law states that the current passing through a metallic conductor is directly proportional to the potential difference applied between its ends.   Where k is the resistance offered by the conductor and is constant for a given conductor. Although a large class of materials is known to follow Ohm’s law, there do exist materials used in circuits that do not follow the direct relationship between V & I.

 

(iv) The slope of the V-I graph shall give:

• resistance

   

• reciprocal of resistance

   

• power

   

• charge

   

Q 5 :    

Read the passage given below and answer the following questions from (i) to (v).

Ohm’s law is the relationship between potential difference and current in a circuit which was first established by George Simon Ohm. The law states that the current passing through a metallic conductor is directly proportional to the potential difference applied between its ends.   Where k is the resistance offered by the conductor and is constant for a given conductor. Although a large class of materials is known to follow Ohm’s law, there do exist materials used in circuits that do not follow the direct relationship between V & I.

 

(v) Four students have plotted the graph between V-I for a conductor. Which one is correct?

Q 6 :    

Read the passage given below and answer the following questions from (i) to (v).

In a circuit, several resistors may be combined to form a network. The combination must have two endpoints to connect it with a battery or other elements of the circuit. When the resistors are connected in series then the current flowing in each remains the same but potential differences across each resistor will vary. When the resistances are connected in parallel, the potential difference across each resistor will be the same though a different amount of current will flow in each resistor.

 

(i) The household circuits are connected in:

• series

   

• parallel

   

• both series and parallel

   

• neither series nor parallel

   

Q 7 :    

Read the passage given below and answer the following questions from (i) to (v).

In a circuit, several resistors may be combined to form a network. The combination must have two endpoints to connect it with a battery or other elements of the circuit. When the resistors are connected in series then the current flowing in each remains the same but potential differences across each resistor will vary. When the resistances are connected in parallel, the potential difference across each resistor will be the same though a different amount of current will flow in each resistor.

 

(ii) The equivalent resistance of two resistors x and y is Z when connected in series and MMM when connected in parallel. Z:M is:

• xy

   

• $x+y\times y$

   

• $\frac{{(x+y)}^2}{xy}$

   

• $xy(2x+2y)$

   

Q 8 :    

Read the passage given below and answer the following questions from (i) to (v).

In a circuit, several resistors may be combined to form a network. The combination must have two endpoints to connect it with a battery or other elements of the circuit. When the resistors are connected in series then the current flowing in each remains the same but potential differences across each resistor will vary. When the resistances are connected in parallel, the potential difference across each resistor will be the same though a different amount of current will flow in each resistor.

 

(iii) Two resistances $10\hspace{0.17em}\Omega and 3\hspace{0.17em}\Omega$  are connected in parallel across a battery. If there is a current of 0.2 A in $10\hspace{0.17em}\Omega$ resistor, the voltage supplied by the battery is:

• 2 V

   

• 1 V

   

• 4 V

   

• 8 V

   

Q 9 :    

Read the passage given below and answer the following questions from (i) to (v).

In a circuit, several resistors may be combined to form a network. The combination must have two endpoints to connect it with a battery or other elements of the circuit. When the resistors are connected in series then the current flowing in each remains the same but potential differences across each resistor will vary. When the resistances are connected in parallel, the potential difference across each resistor will be the same though a different amount of current will flow in each resistor.

 

(iv) Two wires each having a resistance value equal to R are first connected in series and then connected in parallel. The plot shows the graphical representation of resistances in both cases.

• A denotes parallel combination

   

• B denotes series combination

   

• A denotes series combination and B denotes parallel combination

   

• None of the above

   

Q 10 :    

Read the passage given below and answer the following questions from (i) to (v).

In a circuit, several resistors may be combined to form a network. The combination must have two endpoints to connect it with a battery or other elements of the circuit. When the resistors are connected in series then the current flowing in each remains the same but potential differences across each resistor will vary. When the resistances are connected in parallel, the potential difference across each resistor will be the same though a different amount of current will flow in each resistor.

 

(v) The equivalent resistance $(in \Omega )$ of the network across A and B is:

• 2

   

• 1.5

   

• 2.5

   

• 3