Question

What is the electrical energy involved when a charge of Q coulomb flows across a potential difference of V volts?

Answer 1

Concept used: Electrical energy

Prerequisite: Knowledge of electrical energy

Body of the Solution:

1. When a potential difference is applied in a circuit, then the charge starts flowing in the circuit. The amount of energy required to move a charge in the circuit across a given potential difference is known as electrical energy. The electrical energy is measured in Joule.
2. Alternatively, electrical energy can be defined as the product of applied voltage and the amount of charge flows. Mathematically, it can be written as $\mathrm{Electrical}\mathrm{Energy}\mathrm{E}=\mathrm{Charge}\mathrm{Q}\times \mathrm{Potential}\mathrm{difference}\mathrm{V}$

Hence, the electrical energy involved, when a charge of coulomb flows across a potential difference is $\mathrm{E}=\mathrm{QV}$.