ISRO Scientist or Engineer Electrical 2015

The output voltage of the ideal transformer with polarities and dots shown in the figure is given by

The average real power in watts delivered to a load impedance $$ZL = (4 - J2)Ω$$ by an ideal current source $$i(t) = 4 \sin(\omega t + 20^\circ)A$$ is

A network contains B branches and N Nodes. The number of mesh current equations would be

Superposition theorem is valid for

Asine wave as has a peak value of 12 Volts. Its crest factor is

A sinusoidal voltage $$V = 50 \sin \omega t$$ is applied to a series RL circuit. The currentin the circuit is given by $$I = 25 \sin(\omega t - 53^\circ)$$. The apparent power consumed by the load is

A band pass filter is one which

A bulb in staircase has two switches, one switch being at the ground floor and the other being at first floor. The bulb can be turned ON and also OFF by any one of the switch
irrespective of the state of the other switch. The logic of switching of bulb resembles

Time domain expressionsfor the voltage $$V_1(t)$$ and $$V_2(t)$$ is given by
$$V_1(t) = V_m \sin(10 t - 130^\circ)$$ and $$V_2(t) = V_m \cos(10 t + 10^\circ)$$ which is the correct statement
The anticlockwise direction of rotation of phasor may be taken as positive.

In practice, earth is chosen as a place of zero electric potential because it