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GATE 2020 || Measurements || Quiz 4

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Question 1

In a test on a Bakelite sample at 20 kV, 50 Hz by a Schering bridge having a standard capacitor of 106 μF, balance was obtained with a capacitance of 0.35 μF in parallel with a noninductive resistance of 318 Ω, the noninductive resistance in remaining arm of the bridge being 130 Ω.
Determine the value of capacitance of the specimen.

Question 2

A dc potentiometer is designed to measure up to about 2V with a slide wire of 300 mm. A standard cell of emf 1.18 V obtains balance at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of the test cell is

Question 3

In a Maxwell bridge, the fixed-value bridge components have the following values; If and at balance. ____ is the Q factor for the unknown impedance at a supply frequency of 50Hz.

Question 4

The arms of an ac bridge shown in figure below are arranged, for balance as follows: and
The supply frequency is 450 Hz. Determine the loss angle of condenser.

Question 5

The ac bridge shown in the figure is used to measure the impedance Z.

If the bridge is balanced for oscillator frequency f = 2 kHz, then the impedance Z will be

Question 6

In the circuit shown above when if then the value of is ____.
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Sep 23ESE & GATE EE