railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Potentiometers
A simple slide wire potentiometer is used for measurement of current in a circuit. The voltage drop across a standard resistor of 0.2 Ω is balanced at 75 cm. Find the magnitude of the current if the standard cell emf of 1.5 V is balanced at 50 cm.
1
11.25 A
2
5 A
3
0.088 A
4
0.2 A