SSC JE Electrical Engineering 2013

The average value of the voltage wave $$v = 110 + 175 \sin(314t - 25^\circ)$$ volts is

A current from an AC source divides into two branches A and B in parallel. Branch A is an inductor with 30 $$\mu H$$ inductance and 1 Ω resistance. Branch B is another inductor with inductance L and 1.5 Ω resistance. For the ratio of currents in the branches to be independent of supply frequency, value of L should be

A universal motor is one which

If the centrifugal switch of a single phase resistance split induction motor does not open after starting of motor, the motor

Alternators are usually designated to generate which type of AC voltage ?

Three inductors each of 60 mH are connected in delta. The value of inductance of each arm of the equivalent star connection is

The magnetic field energy in an inductor changes from maximum value to minimum value in 5 msec when connected to an AC source. The frequency of the source in Hz is

A voltage source having an open-circuit voltage of 150 V and internal resistance of 75Ω is equivalent to a current source of

A 300 kW alternator is driven by a prime mover of speed regulation 4% while the prime mover of another 200 kW alternator has a speed regulation of 3%. When operating in parallel; the total load they can take without any of them being overloaded is

The commutator in DC machine acts as