SSC JE Electrical Engineering 2012
For the following questions answer them individually
A series R-L-C circuit resonates at 1 MHz. At frequency 1.1 MHz the circuit impedance will be
A current of $$i = 6 + 10 \sin (100 \pi t) + 20 \sin (200 \pi t)$$ is flowing through a series combination of a PMMC and moving iron instrument. Ratio of the two currents as registered by the M.I. and PMMC meter is
Three resistances 5 Ω each are connected in star. Values of equivalent delta resistances are?
A 120 V, 60 W incandescent lamp has to be operated from 220 V, 50 c/s, 1-phase AC supply. In order to do this, a circuit element has to be connected in series with the lamp. Which one of the following series element is preferable ?
For balanced 3-phase supply system, the phasor sum of the line currents is NOT zero if the load is
In a series RLC circuit R = 20 Ω , $$X_L = 30$$ Ω and $$X_c = 30$$ Ω If the supply voltage across the combination is $$v = 100 \sin (100 \pi t + 30^\circ)$$ volts, the instantaneous current and the power factor of the circuit are respectively
