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ISRO EE Quiz 13

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Question 1

An operational amplifier has a time rate of change of voltage of 2 V/µsec. If the peak output voltage is 12 V, what is the bandwidth of the amplifier?

Question 2

The magnetic field intensity of uniform plane wave in air is 20 A/m in the direction ay. The wave is propagating in the az direction at a frequency of 2 x 109 rad/sec. what is the wavelength of the plane wave.

Question 3

Surge impedance of 3 Phase, 400 kV transmission line is 200 Ω. The surge impedance loading of the transmission line is

Question 4

What is the ratio of peak inverse voltage across the diode in center tapped full wave rectifier and the bridge rectifier?

Question 5

A single phase transformer is switched on to an AC supply. In order to have minimum inrush current switch should be closed at?

Question 6

From a circular sheet of paper having radius 50 cm, a sector of 40% area is removed in the shape of an arc section. If the remaining part is used to make a conical surface, then the ratio of the radius to height of the cone is

Question 7

Two identical synchronous machines A and B running at same speed are connected to each other through an inductor. Machine A is supplying an active power to Machine B and Machine B is supplying reactive power to Machine A, then which among the following is correct?

Question 8

Given the points A(x = 2, y = 3, z = -1) and B(r = 4, θ = 30, φ = 120). Find distance between A and B.
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