Electricity Class 10 Science – CBSE Notes & Solved Examples

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Topic Question Set

Q 21 :
Observe the figure given below and answer the following questions from (i) to (v).

The following graphs represent the current versus voltage and voltage versus current for six conductors A, B, C, D, E, and F.

(i) Among conductors A, B, C, D, E, F, the maximum resistance is shown by:

curve C
curve A
curve F
curve D

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(1)

Q 22 :
Observe the figure given below and answer the following questions from (i) to (v).

The following graphs represent the current versus voltage and voltage versus current for six conductors A, B, C, D, E, and F.

(ii) Which of the following does not indicate the resistance of curve B?

The slope of curve B
The ratio of V-intercept to I-intercept
The ratio of total grids on the y-axis to total grids on the x-axis
$3 / 4 Ω$

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(4)

Q 23 :
Observe the figure given below and answer the following questions from (i) to (v).

The following graphs represent the current versus voltage and voltage versus current for six conductors A, B, C, D, E, and F.

(iii) Which indicates the correct sum of least resistances of two graphs?

Curve C + Curve F
Curve A + Curve D
Curve A + Curve F
Curve C + Curve D

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(3)

Q 24 :
Observe the figure given below and answer the following questions from (i) to (v).

The following graphs represent the current versus voltage and voltage versus current for six conductors A, B, C, D, E, and F.

(iv) If resistances shown by curve A and curve E are added, the value will be:

$1.83 Ω$
$1.50 Ω$
$1.64 Ω$
$1.25 Ω$

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(4)

Q 25 :
Observe the figure given below and answer the following questions from (i) to (v).

The following graphs represent the current versus voltage and voltage versus current for six conductors A, B, C, D, E, and F.

(v) Which is true for these graphs?

Both are ohmic conductors
Curve A is ohmic and B is non-ohmic conductor
Both are non-ohmic conductors
Curve B is ohmic and A is non-ohmic conductor

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(3)

Q 26 :
Read the passage carefully and answer the following questions from (i) to (v)

The graph below is a V-I graph of a metallic circuit drawn at two different temperatures $T_{1} a n d T_{2}$

(i) For the above graph choose the correct option depicting which of the two temperatures is higher with justification.

$T_{2} > T_{1}$ ; Slope of V-I graph at $T_{2}$ is greater than slope at $T_{1}$ .
$T_{1} > T_{2}$ ; resistance increases with increase in temperature.
$T_{2} > T_{1}$ ; resistance increases with decrease in temperature.
$T_{1} > T_{2}$ ; Slope of V-I graph at $T_{1}$ is greater than slope at $T_{2}$ .

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(1)

Q 27 :
Read the passage carefully and answer the following questions from (i) to (v)

The graph below is a V-I graph of a metallic circuit drawn at two different temperatures $T subscript 1 space a n d space T subscript 2$

(ii) For the above graph, at which temperature the resistance is higher?

At $T_{1}$
At $T_{2}$
Resistance does not depend upon temperature
None of these

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(2)

Q 28 :
Read the passage carefully and answer the following questions from (i) to (v)

The graph below is a V-I graph of a metallic circuit drawn at two different temperatures $T subscript 1 space a n d space T subscript 2$

(iii) Choose the correct set containing factors on which resistance depends?

Length, Area of cross-section, Temperature, Nature of the material.
Area of cross-section, Temperature, Nature of the material, Colour.
Length, Area of cross-section, Temperature, Intermolecular attraction.
Temperature, Nature of the material, Length, Physical state of material.

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(1)

Q 29 :
Read the passage carefully and answer the following questions from (i) to (v)

The graph below is a V-I graph of a metallic circuit drawn at two different temperatures $T subscript 1 space a n d space T subscript 2$

(iv) What is likely to happen if current in a wire is passed for a longer time than required?

The wire may get burnt and may melt.
Length of the wire may decrease resulting in lower resistance.
Resistance of wire will drop as it will be very difficult to stop the electrons.
Resistance of the wire will get increased due to joule’s heating effect.

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(4)

Q 30 :
Read the passage carefully and answer the following questions from (i) to (v)

The graph below is a V-I graph of a metallic circuit drawn at two different temperatures $T subscript 1 space a n d space T subscript 2$

(v) If the vertical and horizontal axes of a typical V-I straight line graph are reversed, which graph below is likely to represent the I-V graph? (I on vertical, V on horizontal for I-V graph).

A
B
C
D

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(4)

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