PHYSICS · Single correct · A Level · Physics · Electricity · Electricity
Problem
A heater coil is connected to a voltage source. If the applied potential difference is doubled while the resistance of the coil remains unchanged, how does the power dissipated in the coil change?
(a) It becomes 2 times its initial value.
(b) It becomes 4 times its initial value.
(c) It remains unchanged.
(d) It becomes one–fourth of its initial value.