MEASUREMENT AND INSTRUMENTATION QUIZ

The main advantage of Anderson bridge over Maxwell bridge is that

measures high Q inductors.

reduction of the cost.

attaining balance condition is easier.

balance equation independent of frequency.

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The current ‘I’ through a resistance R is measures with the following uncertainties I = 4 A ± 0.5%, R = 100Ω±0.2%. If power is computed from these two measured quantities, the uncertainty in the power computed will be

0.5%

1.5%

1.2%

1%

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The watt hour meter is ______ instrument.

A transfer

An indicating

An integrating

A recording

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The spring material used in a spring control device should have the following property.

Most be of low temperature co-efficient

All of the listed here

Should have low specific resistance

Should non magnetic

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Systematic errors are

All of these

instrument errors.

observational errors.

environmental errors.

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The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A.

4

2

1

5

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To measure the flux, devices used are based on

Photo-voltaic effect

Hall effect

Piezo-electric effect

Voltaic effect

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The pointer of an indicating instrument is generally made of _______

Aluminium

Silver

Copper

Soft steel

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The internal resistance of a milli-ammeter must be very low for

high sensitivity.

minimum effect on the current in the circuit.

high precision.

high accuracy.

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Commonly used standard capacitor is

Concentric cylindrical type

Multiplate parallel plate type

Electrostatic type

Spherical type

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