Electric Circuits A wire of resistance R has it length and cross - section both doubled. Its resistance will become 2R. 4R. R. 0.5R. 2R. 4R. R. 0.5R. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A capacitor having a capacitance of 40 μF is connected across 250 V DC source. The charging current will be least when capacitor is half charged. when capacitor is almost 25% charged. initially. when capacitor is fully charged. when capacitor is half charged. when capacitor is almost 25% charged. initially. when capacitor is fully charged. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A 50 μF capacitor is charged to retain 10 MJ of energy by a constant charging current of 1 A. Determine the voltages across the capacitor? 20 V. 60 V. 50 V. 30 V. 20 V. 60 V. 50 V. 30 V. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits Which of the following are the passive elements? None of these. Both Resistor Bulb None of these. Both Resistor Bulb ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be 0.6. 0.4. 0.9. 0.85. 0.6. 0.4. 0.9. 0.85. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits If the practical units of voltage and current wave each made 20 times as large as they are at present, what would be the consequent alternation in the size of the unit of capacitance? 200 times. Nil. 20 times. 60 times. 200 times. Nil. 20 times. 60 times. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS