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.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 18 V
The terminal voltage $(V_{terminal})$ is -
$V_{terminal}=ε-I.r$
$=20V-(1A.2Ω)$
$=18V$