GPL - Gate Question |

X Close

You need to enable javascript to view this page properly.

Branch

All

Loading

685.

A three phase thyristor bridge rectifier is used in a HVDC link. The firing angle α (as measured from the point of natural commutation) is constrained to lie between 5° and 30°. If the dc side current and ac side voltage magnitudes are constant, which of the following statements is true (neglect harmonics in the ac side currents and commutation overlap in your analysis) [2 marks]
(a) Reactive power absorbed by the rectifier is maximum when α = 5°
(b) Reactive power absorbed by the rectifier is maximum when α = 30°
(c) Reactive power absorbed by the rectifier is maximum when α = 15°
(d) Reactive power absorbed by the rectifier is maximum when α = 10°

asked in Electrical Engineering, 2002

View Comments [0 Reply]
686.

Consider the circuit shown in Fig. If the frequency of the source is 50 Hz, then a value of t_o which results in a transient free response is

[2 marks]
(a) 0 ms
(b) 1.78 ms
(c) 2.71 ms
(d) 2.91 ms

asked in Electrical Engineering, 2002

View Comments [0 Reply]
687.

In the circuit shown in Fig, it is found that the input ac voltage (v) and current i are in phase. The coupling coefficient is K = M/(L₁L₂)^1/2 where M is themutual inductance between the two coils. The value of K and the dot polarity of the coil P-Q are

[2 marks]
(a) K = 0.25 and dot at P
(b) K = 0.5 and dot at P
(c) K = 0.25 and dot at Q
(d) K = 0.5 and dot at Q

asked in Electrical Engineering, 2002

View Comments [0 Reply]
688.

For the circuit shown in Fig, the Boolean expression for the output Y in terms of inputs P, Q, R and S is

[2 marks]
(a) P + Q + R + S
(b) P + Q + R + S
(c) (P + Q )(R + S )
(d) (P + Q)(R + S)

asked in Electrical Engineering, 2002

View Comments [0 Reply]
689.

The output voltage (V_o) of the Schmitt trigger shown in Fig.2.9 swings between +15V and –15V. Assume that the operational amplifier is ideal. The output will change from +15V to –15V when the instantaneous value of the input sine wave is

[2 marks]
(a) 5 V in the positive slope only
(b) 5 V in the negative slope only
(c) 5 V in the positive and negative slopes
(d) 3 V in the positive and negative slopes

asked in Electrical Engineering, 2002

View Comments [0 Reply]
690.

An 11 V pulse of 10 Ms duration is applied to the circuit shown in Fig. Assuming that the capacitor is completely discharged prior to applying the pulse, the peak value of the capacitor voltage is

[2 marks]
(a) 11 V
(b) 5.5 V
(c) 6.32 V
(d) 0.96 V

asked in Electrical Engineering, 2002

View Comments [0 Reply]

792 1 ...‹‹113 114115 116 117 ›› ... 132

High Frequency Word List with Mnemonics

GPL Dictionary is fast way to learn words with mnemonics.
It contains high frequency word list which are mostly asked in various examinations.
It is dedicated for student appearing for PSUs, GRE, UPSC or any other exams in which vocabulary test is taken.
User can save their own mnemonics (key and link).

Check Now