Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

A battery of emf 20 V and internal resistance $2 \Omega$ is connected to a resistor, if the current in the circuit is 1 A, find the terminal voltage of the battery.

Options:

5 V

10 V

12 V

18 V

Correct Answer:

18 V

Explanation:

The correct answer is Option (4) → 18 V

The terminal voltage $(V_{terminal})$ is -

$V_{terminal}=ε-I.r$

$=20V-(1A.2Ω)$

$=18V$