Current Electricity The hot wire of electric bulb's filament is higher than its cold resistance because the temperature co-efficient of filament is None of the listed here Negative Positive Zero None of the listed here Negative Positive Zero ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of conductor varies inversely as Area of cross-section Temperature Resistivity Length Area of cross-section Temperature Resistivity Length ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Sparking occurs when a load is switched off because the circuit has high Inductance Capacitance Resistance Impedance Inductance Capacitance Resistance Impedance ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The resistance of a few meters of wire conductor in closed electrical circuit is Practically zero Very high High Low Practically zero Very high High Low ANSWER DOWNLOAD EXAMIANS APP
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 1.2 x 10-8 ω-m 1.4 x 10-8 ω-m 1.8 x 10-8 ω-m 1.6 x 10-8 ω-m 1.2 x 10-8 ω-m 1.4 x 10-8 ω-m 1.8 x 10-8 ω-m 1.6 x 10-8 ω-m ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 1.0 ohm 0.4 ohm 0.6 ohm 0.8 ohm 1.0 ohm 0.4 ohm 0.6 ohm 0.8 ohm ANSWER DOWNLOAD EXAMIANS APP
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