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Measurements : Nuclear Quiz 3

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Question 1

For the Wheatstone Bridge shown below, current through Galvanometer is ________ μA .

Question 2

An energy meter makes 100 revolutions of its disc per unit of energy. The number of revolutions made by the disc during one hour when connected across 210V source and drawing a current of 20A at 0.8 p.f. leading is

Question 3

A PMMC type voltmeter, having a full-scale reading of 250 V and an internal resistance of 450 kΩ, is connected with the series resistance of 50 kΩ. Calculate the sensitivity of the voltmeter (in ohms/volts).

Question 4

For 0 to 19999 counts DVM, minimum voltage measured by DVM (in mV) in 200 V range is:

Question 5

A single-phase, 230 V Induction Watt-hour meter has a meter constant of 300 revolutions per kWh. If the load is drawing a current of 20 A at a power factor of 0.8 lagging, then the speed of disc is:

Question 6

Consider the integrator of integrating DVM have 200 kΩ resistance and 4 μF capacitor. Find the value of V1 is ___________ volts.

Question 7

For the given Lissajous figure if the horizontal frequency is 100 Hz, then the vertical frequency will be

Question 8

The distributed capacitance Cd of a coil is being measured using a Q-meter. At a frequency of 1 MHz, resonance is observed with a capacitance of 150 pF. When the frequency is increased to 2 MHz, a different capacitance value is required for resonance, which is 30 pF. What is the value of the distributed capacitance Cd of the coil? 

Question 9

In a Q-meter, distributed capacitance of a coil is measured by changing the capacitance of the tuning capacitor. The values of tuning capacitor are C1 and C2 for resonant frequencies f1 and 2f1 respectively. The value of distributed capacitance will be

Question 10

A dc voltmeter has a sensitivity of 1000 /V. When it measures half full scale in 100 V range, the current through the voltmeter is
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