railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Potentiometers
A slide wire is used for the measurement of current in a circuit. The voltage across a standard resistance of 1.0 Ω is balanced at 75 cm. Find the magnitude of the current if the standard cell having an EMF of 2 V is balanced at 50 cm.
1
5 A
2
2 A
3
4 A
4
3 A