Question

What is the work done in moving a charge of 4C from one point to another point having potential difference of 5 volt?​

Answer 1

Answer:

20 J of work is required.

Explanation:

We know that electric power in a circuit is Vi

i.e P = Vi

But power is work done per unit time,

⇒W/t = Vi

⇒W = itV

We know that current is rate of flow of charge, i.e i = Q/t⇒Q=it.

∴W=Q * V

In this case Q = 4C and V = 5 volts

Hence,

W=4(5)

W=20 J

Answer 2

Given: Charge Q = 4C

           Potential difference, V = 5 volt

To Find: Work done , W .

Solution:

To calculate work done W, the formula used :

• Work done = charge x potential difference

• W = Q X V

Applying the above formula-

W = 4 x 5

   = 20 J

W = 20J

Hence, work done is 20 joules.