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1711.

An alternator is delivering power to a balanced load at unity power factor. The phase angle between the line voltage and the line current is
a. 90°
b. 60°
c. 30°
d. 0°

asked in Electrical Paper-1, 1997

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1712.

A second order system is given by d²y/dt² + 12dy/dt + 100y = 0. The damped natural frequency in rad/sec is
a. 100
b. 10
c. √44
d. 8

asked in Electrical Paper-1, 1997

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1713.

The phase angle of the current ‘I’ with respect to the voltage V₁ in the circuit shown in the figure is:

a. 0°
b. +45°
c. – 45°
d. – 90°

asked in Electrical Paper-1, 1997

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1714.

The sinusoidal steady-state voltage gain of the network shown in the given figure will have magnitude equal to 0.707 at an angular frequency of

a. zero
b. RC rad/s
c. 1/RC rad/s
d. 1 rad/s

asked in Electrical Paper-1, 1997

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1715.

A pulse of unit amplitude and width ‘a’ is applied to a series RL circuit as shown in the figure. The current i (t) as ‘t’ tends to infinity will be

a. Zero
b. 1 A
c. A value between zero and one depending upon the width of the pulse
d. Infinite

asked in Electrical Paper-1, 1997

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1716.

The impulse response of an R-L circuit is a
a. Rising exponential function
b. Decaying exponential function
c. Step function
d. Parabolic function

asked in Electrical Paper-1, 1997

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