A)
B)
C)
D)
Correct Answer: B
Solution :
The filament of the heater reaches its steady resistance when the heater reaches its steady temperature, which is much higher than the room temperature. The resistance at room temperature is thus much lower than the resistance at its steady state. When the heater is switched on, it draws a larger current than its steady state current. As the filament heats up, its resistance increases and current falls to steady state value.
You need to login to perform this action.
You will be redirected in
3 sec
