Current Electricity The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around 1.8 x 10-8 ω-m 1.4 x 10-8 ω-m 1.6 x 10-8 ω-m 1.2 x 10-8 ω-m 1.8 x 10-8 ω-m 1.4 x 10-8 ω-m 1.6 x 10-8 ω-m 1.2 x 10-8 ω-m ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which method can be used for absolute measurement of resistances? Wheastone bridge method Releigh method Ohm's law method Lorentz method Wheastone bridge method Releigh method Ohm's law method Lorentz method ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following material has nearly zero temperature co-efficient of resistance? Copper Porcelain Carbon Manganin Copper Porcelain Carbon Manganin ANSWER DOWNLOAD EXAMIANS APP
Current Electricity It becomes more difficult to remove Third electron from the orbit Second electron from the orbit First electron from the orbit Any electron from the orbit Third electron from the orbit Second electron from the orbit First electron from the orbit Any electron from the orbit ANSWER DOWNLOAD EXAMIANS APP
Current Electricity An electrical lamp coonsumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is 0.05 kWh 5 kWh 0.005 kWh 5 kWh 0.05 kWh 5 kWh 0.005 kWh 5 kWh ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is 400 Ω 600 Ω 800 Ω 1000 Ω 400 Ω 600 Ω 800 Ω 1000 Ω ANSWER DOWNLOAD EXAMIANS APP
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