Electrical &Electronic Measurements Quiz1

The power supply frequency in India

• 25Hz

• 60Hz

• 50 Hz

• 100Hz

Unit of inductance

• Ohm

• Henry

• Farad

• Watts

Which of the following is an integrating instrument?

• Ammeter

• Voltmeter

• Energymeter

• Wattmeter

The Wheatstone bridge is balanced when

• PQ=RS (a)

• either b or c (d)

The type of damping used in a PMMC instrument is

• Eddy current damping

• Air friction damping

• fluid friction damping

• None of these

The slow but continuous rotation of energymeter disc on no load condition is termed as

• Cogging

• Crawling

• Creeping

• Sweeping

The AC bridge that is used to measure capacitance is

• Wheatstone bridge

• Schering bridge

• London bridge

• Maxwell bridge

The range of powerfactor

• -0.5 to 0

• 0 to 1

• 0 to 0.5

• 0 to 0.866

The resistance of an ideal ammeter is

• infinity

• below 5 ohms

• above 100000 ohms

• zero

Which of the following methods is used for the localization of cable fault?

• Potentiometer method

• Voltmeter Ammeter method

• Murray loop test

• Hopkinson test