railway RRB Technician Grade 3 Mock Test 2024 Physics Current, Resistance and Electricity Electric Current
The potential difference between the two end terminals of an electric heater is 220 V and the current through it is 0.5 A. What would be the current through the heater if the potential difference across the terminals of the heater is reduced to 120 V?
1
1.0 A
2
0.5 A
3
0.27 A
4
0.7 A