Question # 1

Which of the following quantity is defined in terms of the rate of change of electric displacement field.

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Conventional current

Electronic current

Displacement current

Pulsating current

The amount of heat developed in a resistor is directly proportional to.

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The square of the current only

The resistance of the conductor only

The time of current passing only

The square of current resistance and teh time of current flow

House hold circuits are mostly

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Wired in sires

Wired in parallel

Made using wires of gold

Made using wires of silver

A magnetic pole

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Is made of a magnetic material

Is a factious quantity

Is defined in terms of Ampere's law

Cannot be detected

All the magnetic materials lose their magnetic properties when

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Dipped in oil

Dipped in water

Heated

Cooled

In any L-C-R circuit

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Current lags the applied voltage

Current leads the applied voltage

Current sometimes leads and sometimes lags the applied voltage

Current remains in phase with voltage

When a direct current is passed though a junction formed of two dissimilar metals the junction becomes warmer or cooler depending on the.

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Current direction

Thermocouple used

Temperature gradient

Amount of current

When a wire moves perpendicularly to a magnetic field, the induced emf does ot depends upon

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The velocity of the wire

The resistance of the wire

The flux density of the magnetic

The orientation of the wire field

Electrostatic force as compared to gravitational force is

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Zero

infinite

Very weak

Very strong

The sum of the positive and negative peak values is known as.

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Peak value

Average value

Instantaneous value

Peak to peak value

A pure capacitor is connected in an AC circuit The power factor of the circuit will be.

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Unity

Infinity

0.5

Zero

What type of current is produced by batteries.

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Direct current

Alternating current

Pulsating current

Convection current

Electric Heater operates on the principle of.

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electromagnetism

Electromagnetic induction

Electrolysis

Momentum

A substance which has empty conduction band.

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Insulator

Conductor

Semi conductor

super conductor

A capacitor is prefect insulator for

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Direct current

Alternating current

Direct as well as alternating current

Pulsating current

A pair of point charges with equal magnitude and opposite sign separated by a distance 'r' produce.

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Electric dipole

Electric charge

Electric field

electric arc

When a balloon sticks to the whiteboard It is an example of.

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Conoduction

Induction

Polarization

Conservation of charge

In what form is the energy stored in an inductor.

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Magnetic

electrostatic

Magnetic and electrostatic

All of the above

It is sometimes necessary to protect electrical apparatus from magnetic field This can be done by surrounding the apparatus with a box made from.

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Aluminum

Iron

Steel

Rubber

The conductivity of a conductor is independent of the

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Electric charge

Electric potential

Electric field

Internal resistance

What is the term for an motion of charge from one region to another.

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electric charge

Electric current

Electric field

Electric potential

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