Current Electricity If the efficiency of a machine is to be high, what should be low? Input power Losses kWh consumed True component of power Input power Losses kWh consumed True component of power ANSWER DOWNLOAD EXAMIANS APP
Current Electricity When current flows through heater coil it glows but supply wiring does not glow because Resistance of heater coil is more than the supply wires Supply wires are made of superior material Current through supply line flows at slower speed Supply wiring is covered with insulation layer Resistance of heater coil is more than the supply wires Supply wires are made of superior material Current through supply line flows at slower speed Supply wiring is covered with insulation layer ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Ohm's law is not applicable to High voltage circuits Carbon resistors Vaccum tubes Circuits with low current densities High voltage circuits Carbon resistors Vaccum tubes Circuits with low current densities 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
Current Electricity A thermistor has Positive temperature coefficient Negative temperature coefficient Zero temperature coefficient Variable temperature coefficient Positive temperature coefficient Negative temperature coefficient Zero temperature coefficient Variable temperature coefficient ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a tungsten lamp _____ as applied voltage increases. Remains same Increases None of the listed here Decreases Remains same Increases None of the listed here Decreases ANSWER DOWNLOAD EXAMIANS APP
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