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GATE 2023 Electrical & Electronics Measurements Evaluation Quiz 15

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Question 1Multiple Correct Options

The 7 volt Zener diode in below figure is ideal and the ammeter of full scale 5mA, has an internal resistance of 150 Ohm. The circuit shown can function as

Question 2

A 250V M.I. voltmeter has coil resistance of 500Ω, coil inductance 0f 1.04 H and series resistance of 2kΩ. The meter reads correctly at 250V DC. What will be the value of capacitance to be used for shunting the series resistance to make the meter read correctly at 50Hz? What is the reading of voltmeter(in Volts) on A.C. without capacitance?

Question 3

A (0 – 50) moving coil ammeter has a voltage drop of 0.1 V across its terminals at full scale deflection. The external shunt resistance (in milliohms) needed to extend it range (0 – 500 A) is ________.

Question 4

The inductance of the moving iron instrument is given as L=1+6θ-2θ2 mH.

If the control spring torque is
 4×10-3 N-m then find deflection in radian for a current of 3 A.

Question 5

A moving coil ammeter has a moving coil of dimensions 20 mm × 15 mm with 150 turns. If a current of 4 mA is applied to the coil, find the angular deflection (in degree) of the pointer. The flux density in the air gap is 1.6 × 10-3 Wb/m2 and the spring constant is 0.46 × 10-6 Nm/rad.

Question 6

In the following circuit (HWR), the ammeter reads 13.46 Amp when it is of MI type. What would be the ammeter reading (in Amp) if it is of MC type?

Question 7

In the given dc circuit shown below a PMMC voltmeter with internal resistance of 50 kΩ and range of 0 - 5 V is connected across 0.2 MΩ resistance. The reading shown by the meter will be

Question 8

The diode is ideal & the centre-zero PMMC ammeter is connected across the diode shown in fig. What will be the reading of the meter?

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Jul 30ESE & GATE EE