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 1.2 x 10-8 ω-m 1.6 x 10-8 ω-m 1.4 x 10-8 ω-m 1.8 x 10-8 ω-m 1.2 x 10-8 ω-m 1.6 x 10-8 ω-m 1.4 x 10-8 ω-m ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the efficiency of a machine is to be high, what should be low? True component of power Input power kWh consumed Losses True component of power Input power kWh consumed Losses ANSWER DOWNLOAD EXAMIANS APP
Current Electricity International ohm is defined in terms of the resistance of The unit length of wire A cube of copper A column of mercury A cube of carbon The unit length of wire A cube of copper A column of mercury A cube of carbon ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following is the best material for making connecting wires? Nichrome Copper Constant Manganin Nichrome Copper Constant Manganin ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The example of non-ohmic resistance is Carbon resistance Copper wire tungsten wire Aluminium wire Carbon resistance Copper wire tungsten wire Aluminium wire ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The SI unit of power is Watt Coulomb Watt-hour Henry Watt Coulomb Watt-hour Henry ANSWER DOWNLOAD EXAMIANS APP
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