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BARC-2018 EE: Electrical & Electronics Measurement Quiz 2

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Question 1

A dc voltmeter with sensitivity 1 kΩ/V and internal resistance 200 Ω is connected with a silicon diode and a series multiplier of 50 kΩ, as shown below.

If an ac voltage of 25 V r.m.s is applied at the input, how much voltage is displayed by the dc voltmeter?

Question 2

If an ac voltmeter using full wave rectifier displays an output of 57.6 V, what is the ac input applied to the voltmeter?

Question 3

The circuit shown below is a series type ohmmeter for measuring an unknown resistance .

What is the purpose served by the shunt resistor R2?

Question 4

A lissajous pattern on oscilloscope is stationary and has 6 horizontal tangencies and 4 vertical tangencies. The frequency of horizontal input is 1200 Hz. determine the frequency of vertical input.

Question 5

An electrically deflected Cathode Ray Tube has a final anode voltage of 2000 V and parallel deflecting plates 1.5 cm long and 5 mm apart. If the screen is 50 cm from the centre of deflecting plates, find velocity of beam (in m/sec).
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Jun 24ESE & GATE EE