72.

73.

74.

75.

76.

77.

78.

An alternator of rating 10 MVA, 11 kV with 10% of reactance is connected to a busbar. Find
the short circuit level at the busbar :

(A) ۵۸ (B) 50MVA
(© 100MVA (D) 200MVA

Which of the following are provided to reduce the ferrantic effect in the transmission line?
(^) Series reactor (B) Shunt capacitor

(C) Series capacitor (D) Shunt reactor

The generator bus of per unit voltage 1.5.5° is connected to an infinite bus of per unit
voltage 1.025° through a 0.5 per unit reactance. Then the active power will flow from :

(A) infinite bus to generator bus

(B) no active power will flow

(C) generator bus to infinite bus

(1) none of the above

A long underground cable of 200 km length have a surge impedance of 50 Q. What is the
value of surge impedance of the same cable length 100 km?

(^) 100 (2 ൯ 95൨
(0 502 (D) ೩೦೦೧

A mechanism for carrier motion in semiconductor which occurs when an electric field is
applied :

(A) Carrier diffusion (B) Recombination
(C) Carrier drift (D) _ Diffusivity

A 0.9 wF capacitor is charged to 50 V is discharged to 25 V through a resistive path of 20 kQ.
How long in milliseconds, it will take for the discharge operation?

(A) 1.25 (B) 12.5
(© 125 (D) 0
At —_————— Hz, is an RLC series circuit, maximum voltage occurs across the capacitor C

ifR=2QL=1HandC=0.1yF.

(A) ಸಾ (8) 7
(0) ഷ്‌. (D) None
27

231/2023 14 A