Write the expression for electrical power and state the unit of each quantity in the formula.

easy 2 marks Class 10 · Science · Electricity

Answer

Power

P = V I

, where

P

is in watts (W),

V

in volts (V), and

I

in amperes (A).

The correct answer is Power $P = V I$ , where $P$ is in watts (W), $V$ in volts (V), and $I$ in amperes (A). — Identify the units: $P$ is measured in watts (W), $V$ in volts (V), and $I$ in amperes (A).

Step-by-step solution

Recall that electrical power is the rate at which energy is transferred.
The standard formula is $P = V I$ .
Identify the units: $P$ is measured in watts (W), $V$ in volts (V), and $I$ in amperes (A).

Common mistake: Writing

P = V / I

or mixing up the symbols.

Concept tested: Power formula

Published 23 August 2026 · How this solution was prepared and checked

Write the expression for electrical power and state the unit of each quantity in the formula.

Step-by-step solution

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