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 Length of heating element should be decreased None of these Length of heating element has no effect on heating if water Length of heating element should be increased Length of heating element should be decreased None of these ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is Positive About 2 ohms per degree Negative Zero Positive About 2 ohms per degree Negative Zero ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is 0.4% 0.3% 0.2% None of the listed here 0.4% 0.3% 0.2% None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A wire having very high value of conductance is said to be Insulator Moderately good conductor Very good conductor None of the listed here Insulator Moderately good conductor Very good conductor None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The SI unit of power is Coulomb Henry Watt Watt-hour Coulomb Henry Watt Watt-hour ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as 4 : 25 2 : 5 25 : 4 5 : 2 4 : 25 2 : 5 25 : 4 5 : 2 ANSWER DOWNLOAD EXAMIANS APP
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