Answer :

(i) As, V = IR

If, I = 1A and R = 1Ω then, V = 1V

The difference of potential that would carry one ampere of current against one-ohm resistance.

(ii) According to the definition, the potential difference between two points is defined as the amount of work done in moving charge from one point to another.

So, Potential difference =

V =

For, work done = 100J and charge = 20C

V =

=

= 5J

OR

(i) I =

If, I = 1A and t = 1s then, q = 1C.

Coulomb is that amount of electric charge required by one ampere current in unit time.

(ii) I =

For, I is electric current, q is electric charge, and t is time.

Now, I = 200m A and t = 20min

200 × 10^{-3} =

0.2 × 1200 = q

240C = q

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