SSC JE Electrical Engineering 25th May 2014 Shift-1
For the following questions answer them individually
The synchronous speed of a three phase induction motor having 20 poles and connected to a 50 Hz source is
A circuit with a resistor, inductor and capacitor in series is resonant of $$f_o$$ Hz. If all the component values are now doubled the new resonant frequency is
A 2 cm long coil has 10 turns and carries a current of 750 mA. the magnetising force of the coil is
A consumer has annual consumption of 700800 units. If his maximum demand is 200 kW. The load factor will be
Which one of the following bridges is generally used for measurement of frequency and also capacitance?
Two voltmeter of (0-300 V) range are connected in parallel to a A.C. circuit. One voltmeter is moving iron type reads 200 V. If the other is PMMC instrument, its reading will be
The least number of $$1 - \phi$$ wattmeters required to measure total power consumed by an unbalanced load fed from a $$3 \phi$$ , 4 wire system is
