Question

how much work done for a unit charge moving in a circuit for emf 30 v​

Answer 1

Given:

Unit charge is moved in potential difference of 30 volts.

To find:

Work done ?

Calculation:

• Potential difference in a circuit is defined as the work done to transport a unit positive charge from one place to another in an uniform electric field.

• In other words, potential difference is equal to the work done divided by the magnitude of charge.

$PD = \dfrac{work}{charge}$

$\implies 30 = \dfrac{work}{1}$

$\implies work = 30 \times 1$

$\implies work = 30 \: Joule$

So, work done is 30 Joules.