Question

80 Joule of work is done in moving a charge of 4 coulomb from one terminal of the battery to another. what is the potential difference of the battery?
(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answer 1

Solution:
Given:
Work done (W)= 80 J
Charge (Q)= 4 C

We know that
The potential difference(p.d) between two point in an electric circuit is defined as the amount of work done in moving a unit charge from one point to the other point.

Potential difference (V) = work done (W)/Charge (Q)

V= W/Q
Putting the values in the above formula we get:
V= 80/4
V= 20 V

Hence, the potential difference of the battery is 20 V.

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Answer 2

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