Electric Circuits When AC flows through a pure capacitance then the current lags the emf by 90o. leads the emf by 90o. leads the emf by - 90o. is in phase with emf. lags the emf by 90o. leads the emf by 90o. leads the emf by - 90o. is in phase with emf. 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 0.4. 0.85. 0.6. 0.9. 0.4. 0.85. 0.6. 0.9. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits In RLC series circuit R = 2Ω, L = 2mH and C = 1μF. Find the time constant of the circuit? 2 μsec 1 μsec 2 msec 4 msec 2 μsec 1 μsec 2 msec 4 msec ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits The capacitance of a parallel plate capacitor can be varied by All of these changing the overlapping area of the plates only. changing the dielectric medium only. changing the distance between the plates only. All of these changing the overlapping area of the plates only. changing the dielectric medium only. changing the distance between the plates only. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A branch of a network is said to be active when it consists of one resistor. capacitor. inductor. voltage source. resistor. capacitor. inductor. voltage source. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A external resistance R is connected to a cell of internal resistance r, then the current is maximum when None of these R = r. R < r. R > r. None of these R = r. R < r. R > r. ANSWER DOWNLOAD EXAMIANS APP
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