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 1.6 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 1.8 x 10-8 ω-m 1.2 x 10-8 ω-m ANSWER DOWNLOAD EXAMIANS APP
Current Electricity An electric filament bulb can be worked from AC supply only All of the listed here Battery supply only DC supply only AC supply only All of the listed here Battery supply only DC supply only ANSWER DOWNLOAD EXAMIANS APP
Current Electricity A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will Decreases Heater will burn out Increases Remains same Decreases Heater will burn out Increases Remains same ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Which of the following is the best conductor of electricity? Copper Zinc Gold Silver Copper Zinc Gold Silver ANSWER DOWNLOAD EXAMIANS APP
Current Electricity International ohm is defined in terms of the resistance of A column of mercury The unit length of wire A cube of copper A cube of carbon A column of mercury The unit length of wire A cube of copper A cube of carbon ANSWER DOWNLOAD EXAMIANS APP
Current Electricity For testing appliances, the wattage of test lamp should be Low Any value High Very low Low Any value High Very low ANSWER DOWNLOAD EXAMIANS APP
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