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Choose the correct alternatives

A

It is easier to start a car engine on a warm day than on a chilly cold 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.

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The correct Answer is:
A, B, D
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