Explore topic-wise MCQs in Measurements and Instrumentation.

Assertion (A): Schering bridge is a low voltage bridge.

Reason (R): Schering bridge is very commonly used for measurement of capacitance.

A single element strain gauge bridge has two fixed resistances R1 and R1 of 120 each and a variable resistance which gives full deflection at 120 for zero strain and 120.6 for straine e. If gauge factor is 2, strain e is

A meter coil has a resistance of 100 and a full scale deflection current of 10 mA. To convert it into a voltmeter of 0-200 V range, the series resistance should be

The dimensions of EMF are

Which of the following instruments has non-linear scale?

1.Moving coil instrument

2.Moving iron instrument

3.Electrostatic instrument

4.Rectifier instrument

Select the answer as per following codes

It is required to measure angular position. Out of the transducers

1.Circular potentiometer

2.LVDT

3.E pick up

4.Synchro

The proper devices are

A single element strain gauge bridge has two fixed resistances R1 and R1 of 120 each and a variable resistance which gives full deflection at 120 for zero strain and 120.6 for straine e. If gauge factor is 2, strain e is

If an inductance L is connected in one arm of bridge and resistance R1, R2, R3 in other three arms

An accelerometer has a seismic mass of 0.05 kg and spring constant of 3 x 105 N/m. If maximum displacement of mass is 1 mm, the maximum acceleration which can be measured is

The coil of a moving iron instrument has a resistance of 500 and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 , its reading when fed by 250 V, 50 Hz ac will be

The resistance of a 125 strain gauge changes by 1 ohm for 4000 micro strain. The gauge factor is

Assertion (A): Shunt of an ammeter has a low resistance.

Reason (R): Shunt may be connected in series or in parallel with ammeter.

Assertion (A): A hot wire ammeter has a cramped scale.

Reason (R): The heat is proportional to square of current.

A moving coil instrument has a resistance of 0.5 and a full scale deflection of 0.1 A. To convert it into an ammeter of 0-10 A the shunt resistance should be

In a resistance strain gauge, G = 2, stress = 1050 kg/cm2, R = 1000 . The value of R will be

A meter with a resistance of 100 and a full scale deflection of current of 1 mA is to be converted into voltmeter of 0 - 5 V range. The multiplier resistance should be

Consider the following statements: In a differential amplifier using JFET, the differential output offset is due to

1.mismatch between FET parameters

2.difference in values of resistances used in circuit

3.variation in supply voltage.

Of the statements, the correct statements are

The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240 x 10-6 N-m on full scale. If B = 1 Wb/m2, range of meter is

Assertion (A): When a wattmeter is used for low impedance loads, the pressure coil is connected across the load.

Reason (R): A wattmeter measures apparent power.

A moving coil instrument has a resistance of 0.6 and full scale deflection at 0.1 A. To convert it into an ammeter of 0-15 A range, the resistance of shunt should be

Assertion (A): De sauty's bridge is suitable only for pure capacitor.

Reason (R): Capacitors are mostly perfect.

Which of the following voltmeters would you use for measuring voltage across 20 k resistance?

If reference sound pressure P0 is 2 x 10-5 N/m2, a sound pressure of 90 dB is equal to

Two resistors R1 = 36 5% and R2 = 75 5% are connected in series. The total resistance is