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Multiple Choice Question (MCQ) of Measurements page-1

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1.The torque produced in a wattmeter is proportional to

a) The average value of current in the two coils
b) The r.m.s. value of currents in the two coils
c) The average value of the supply voltage
d) None of the above

Ans: (b)

2.The Dielectric heating is used for heating the

a) Wood
b) Steel billets
c) Zinc cells
d) Furnace

Ans: (a)

3. To measure the e.m.f. of a Weston standard cell one would use

a) A moving coil voltmeter
b) A hot wire voltmeter
c) An electrostatic voltmeter
d) Galvanometer
e) Potentiometer

Ans: (e)

4. Which would be large as regards the space occupied?

a) 1 ohm. 54 watt resistor
b) 500 ohms, 5 watt resistor

Ans: (a)

5. Which of the following is the best conduct?

a) Copper
b) Aluminium
c) Silver
d) Iron

Ans: (c)

6. The resonant frequency of R-L-C circuit can be changed

a) By changing inductance only
b) By changing inductance or capacitance
c) By changing resistance only
d) By changing capacitance only

Ans: (b)

7. The Dielectric loss can be measured by

a) Energymeter
b) Wheatstone bridge
c) Electrostatic wattmeter
d) None of the above

Ans: (c)

8. The design of Inductance coil is desirable for

a) Low time constant
b) High time constant
c) Zero time constant
d) R-C time constant

Ans: (b)

9. Three-phase four-wire energymeter is used to measure

a) Three-phase balanced energy
b) Three-phase unbalanced energy
c) Single-phase energy
d) Two-phase energy

Ans: (b)

10. The potentiometer can be used to measure the current.

a) True
b) False

Ans: (a)

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