a) The average value of current in the two coils b) The r.m.s. value of currents in the two coils c) The average value of the supply voltage d) None of the above Ans: (b)
a) Wood b) Steel billets c) Zinc cells d) Furnace Ans: (a)
a) A moving coil voltmeter b) A hot wire voltmeter c) An electrostatic voltmeter d) Galvanometer e) Potentiometer Ans: (e)
a) 1 ohm. 54 watt resistor b) 500 ohms, 5 watt resistor Ans: (a)
a) Copper b) Aluminium c) Silver d) Iron Ans: (c)
a) By changing inductance only b) By changing inductance or capacitance c) By changing resistance only d) By changing capacitance only Ans: (b)
a) Energymeter b) Wheatstone bridge c) Electrostatic wattmeter d) None of the above Ans: (c)
a) Low time constant b) High time constant c) Zero time constant d) R-C time constant Ans: (b)
a) Three-phase balanced energy b) Three-phase unbalanced energy c) Single-phase energy d) Two-phase energy Ans: (b)
a) True b) False Ans: (a)