Question

1. Why is potential difference useful?

Answer 1

Step 1: Concept

Potential Difference: The potential difference between two points is the work required per unit charge to transfer a charge from one point to the other point. It is represented by$V$.

Step 2: Formula

Formula: $V=W/Q$ ; Where, $V$ = voltage, $\mathrm{W}=$ work done to transfer the charge, $\mathrm{Q}=$total charge transferred from one point to another point.

Step 3: Explanation:

Potential is useful because:

1. Because it gives the information about the energy available to push the charge into the electric circuit.
2. It is the most commonly used electrical quantity and it is a fundamental for storing and releasing electrical energy.
3. High potential difference is used in an electron microscope to accelerate electrons in electrons beam that are bombarded on the sample under examination.

Hence the potential difference is useful.