Current Electricity In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains Length of heating element has no effect on heating if water Length of heating element should be increased None of these Length of heating element should be decreased Length of heating element has no effect on heating if water Length of heating element should be increased None of these Length of heating element should be decreased ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The substances which have a large number of free electrons and offer a low resistance are called Insulators Inductors Conductors Semi-conductors Insulators Inductors Conductors Semi-conductors ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The current in the circuit having constant resistance is tripled. The power increases 3 times 1/9 times 9 times 1/3 times 3 times 1/9 times 9 times 1/3 times ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With rise in temperature the resistance of pure metals Increases Remains constant First increases and then decreases Decreases Increases Remains constant First increases and then decreases Decreases ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Insulators have _______ temperature co-efficient of resistance. Negative None of the listed here Positive Zero Negative None of the listed here Positive Zero ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A thermistor has Zero temperature coefficient Negative temperature coefficient Variable temperature coefficient Positive temperature coefficient Zero temperature coefficient Negative temperature coefficient Variable temperature coefficient Positive temperature coefficient ANSWER DOWNLOAD EXAMIANS APP
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