Choose the correct alternatives
A. It is easer to start a car engine on a warm day than on a chilly clod day because the internal resistance of battery decreasses with rise in temperature
B. It is more economical to transmit electric power at high voltage and low current rather than at low voltage and high current because heat loss is proportional to square of current.
C. The heating coil of an electric iron is enclosed in mica sheets because mica is a conductor of heat and good conductor of electricity.
D. The heating coil of an electric iron is enclosed in mica sheets because mica is good conductor of heat and bad conductor or electricity.
