Q.16 A parallel plate capacitor filled with
two dielectrics is shown in the figure below. If the electric field in the
region A is 4 kV/cm, the electric field in the region B, in kV/cm, is

(A) 1

(B) 2

(C) 4

(D) 16

Answer: (A) 1

Q.17 A 50 MVA, 10 kV, 50 Hz, star-connected,
unloaded three-phase alternator has a synchronous reactance of 1 p.u. and a
sub-transient reactance of 0.2 p.u. If a 3-phase short circuit occurs close to
the generator terminals, the ratio of initial and final values of the
sinusoidal component of the short circuit current is ________.

Answer: 0.2

Q.18 Consider a linear time-invariant system
with transfer function

H(s) = 1/(1+s)

If the input
is cos(t) and the
steady state output is

**A**cos(t+ a), then the value of**A**is _________.
Answer: 0.707

Q.19 A three-phase diode bridge rectifier is
feeding a constant DC current of 100 A to a highly inductive load. If
three-phase, 415 V, 50 Hz AC source is supplying to this bridge rectifier then
the rms value of the current in each diode, in ampere, is _____________.

Answer: 57.77

Q.20 A buck-boost DC-DC converter, shown in
the figure below, is used to convert 24 V battery voltage to 36 V DC voltage to
feed a load of 72 W. It is operated at 20 kHz with an inductor of 2 mH and
output capacitor of 1000 µF. All devices are considered to be ideal. The peak voltage across the solid-state switch

**(s)**in volts, is _
Answer: 24

Please
report if you find any errors in the questions.

Answers/Solution
of remaining questions are under evaluation and the same will be published here
soon.

Keep
watching the space