When connected to a voltage source, a coil of tungsten wire initially dissipates 500 W of power. In a short time, the temperature of the coil increases by 150oC because of joule heating.
(a) Will the dissipated power (1) increase, (2) remain the same, or (3) decrease? Why?
(b) What is the corresponding change in the power?
(c) What is the percentage change in its current?