Current Electricity In which of the following substances the resistance decreases with increase in temperature? Carbon Constantan Copper Silver Carbon Constantan Copper Silver ANSWER DOWNLOAD EXAMIANS APP
Current Electricity What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω? 200 V 100 V 50 V 150 V 200 V 100 V 50 V 150 V ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Eureka has _______ temperature co-efficient of resistance. Almost zero Positive Negative None of the listed here Almost zero Positive Negative None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The electrical energy required to heat a bucket of water to a certain temperature is 4 kWh. If the heat losses are 20 percent, the energy input is 2 kWh 6 kWh 3.2 kWh 5 kWh 2 kWh 6 kWh 3.2 kWh 5 kWh ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With rise in temperature the resistance of pure metals Remains constant Increases Decreases First increases and then decreases Remains constant Increases Decreases First increases and then decreases ANSWER DOWNLOAD EXAMIANS APP
Current Electricity E. M. F. In a circuit Decrease circuit resistance Increases circuit resistance Maintains potential difference None of the listed here Decrease circuit resistance Increases circuit resistance Maintains potential difference None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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