Measurements and Instrumentation - ECE Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Two resistance R₁ and R₂ are connected in series R₁ = 528 ± 5 Ω and R₂ = 325 ± 3Ω. The total resistance will be

853 ± 2 Ω

853 ± 5 Ω

853 ± 3 Ω

853 ± 8 Ω

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The function of shunt in an ammeter is to

by pass the current

increase sensitivity of meter

increase resistance of meter

all of the above

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Which of the following does not use the principle of change in inductance?

LVDT

Inductance displacement transducer

Strain gauge

Reluctance pick up

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

It is necessary to measure the amplitudes of two signals and also the phase difference between them. This can be done by using a

phase meter

waveform meter

vector voltmeter

digital voltmeter

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

A sinusoidal signal is measured by CRO. The scale is set at 4 mV/cm. If vertical distance between positive and negative peaks is 6 cm, the peak value of ac signal is

6 mV

12 mV

24 mV

3 mV

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Wheatstone bridge is suitable for low resistances.

True

False

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

To avoid creep in an energy meter

two shading bands are put on shunt magnet

two shading bands are put on series magnet

two holes are cut in the disc on opposite sides of spindle

the potential coil is made of very thin wire

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

A wire strain gauge has a gauge factor of 2, resistance of 125 Ω and length 1 m. If length of wire changes by .005 m, change in resistance will be

0.25 Ω

0.5 Ω

1.25 Ω

2.5 Ω

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Four voltmeters have following specifications. If accuracy is main consideration which is the best?

100 V, 2 mA

100 V, 100 mA

100 V, 1 mA

100 V, 0.1 mA