Q. Which of the following instruments has non-linear scale?

1. Moving coil instrument
2. Moving iron instrument
3. Electrostatic instrument
4. Rectifier instrument

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Q. Kelvin's double bridge is used to measure low resistances because

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

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

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Q. The scale of hot wire instrument is linear.

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Q. The D'Arsonval- movement can be converted into audio frequency ac ammeter by adding a

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

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Q. A meter having 0-1000 μA range and 1000 Ω resistance is required to be changed to 0-100 mA meter. The value of shunt resistance is about

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Q. An induction wattmeter can be used for

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Q. If the current in a capacitor leads the voltage by 80°, the loss angle of capacitor is

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Q. In an induction wattmeter, the shading bands are made of non conducting material.

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Q. Consider the following statements

1. Thermistor is more sensitive than platinum resistance thermometer
2. The resistance of thermistor is solely a function of its absolute temperature whether the source of heat is external or internal
3. Thermistor has linear temperature-resistance relationship
4. Thermistor has linear negative temperature coefficient

Of the Statements, the correct statements are

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Q. A moving coil meter has 10 Ω resistance and requires 40 mA for full scale deflection. The shunt resistance required to convert it into 0-2 A ammeter is

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Q. Which of the following instruments can be used for dc as well ac upto a few MHz?

1. Moving iron instrument
2. Thermocouple instrument
3. Induction instrument
4. Moving coil instrument

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Q. Assertion (A): Strain measurement using strain gauge invariably requires a dummy strain gauge.

Reason (R): The resistance of strain gauge depends on temperature.

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Q. If a shunt of 200 Ω resistance is used with a galvanometer of 1000 Ω resistance, the multiplying power is

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Q. Insertion of a dielectric material between the plates of an air capacitor

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Q. Two ammeters A and B are connected in parallel in a circuit carrying 100 A. Their resistances are 0.8 mΩ. Their readings will be.

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Q. In household energy meters the flux of series magnet is in phase with current but the flux of shunt magnet lags the voltage by 88°. The reading of energy meters

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Q. Assertion (A): A universal RLC bridge has a battery and also a high frequency ac source.

Reason (R): RLC bridge uses a Wienbridge arrangement for measuring capacitance.

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Q. A capacitance transducer can be used to measure

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