engineering recuitment BHEL Engineer Trainee Mock Test 2025 Electrical and Electronics Measurements Potentiometers
Find the EMF of the battery if the length of a wire of a potentiometer is 250 cm and the EMF of its standard cell is 10 volt. It is employed to measure the EMF of a battery whose internal resistance is 0.5Ω and. If the balance point is obtained at l = 25 cm from the positive end.
1
\(\frac{1}{2}\) V
2
1 V
3
1.5 V
4
2 V