Question # 1

The best conductor is:

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Silver

Copper

Aluminimum

Both B and C

None of them

The example/s of non-electrical energy to electrical is/are:

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Chemical energy

Mechanical energy

Heat energy

Both (A) and (B)

All of these

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

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Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

In gases, the charge carriers are:

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Electrons

Positive ions

Negative ions

Both A and C

Both A and B

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

The current that flows through the coil of a motor causes

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shaft to rotate

None of these

Magnetic effect of current is used:

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In electric motor

To detect current

To measure current

All of these

None of these

The inkjet printer ejects a thin stream of:

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Water

Oil

Ink

Any of above

None of these

In a metal, the valence electrons are:

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Attach to individual atoms

Not attached to individual atoms

Free to move within the metal

Both (A) and (C)

Both (B) and (C)

Flux through a closed surface of any shape and flux through the surface of a sphere drawn around a charge are:

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Different

Same

Such that it is greater in the first case

Such that it is greater in the second case

None of these

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

Electric flux is:

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Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

The current that flows through the coil of a motor causes:

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shafts to rotate

None of these

Electric field lines emerge from the charge in:

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One dimension

Two dimensions

Three dimensions

Four dimensions

None of them

The value of relative permittivity of different dielectrics are:

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Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

The surface destiny of charge is defined is:

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Charge per volume

Mass per volume

Charge per area

Mass per area

Both (B) and (C)

Two dissimilar metals joined at their ends kept at constant temperature constitute:

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Cell

Voltmeter

Thermocouple

Potentiometer

None of these

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

The earth’s potential and potential at infinity are taken:

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Equal

Zero

First is greater than the second

Second is greater than the first

Both (A) and (B)

An important part of inkjet printer is:

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Toner

Drum

Deflection plates

Heated roles

None of these

The term drift velocity is used when the ends of a wire are:

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Connected to a laser source

Connected to a voltage source

Not connected to a voltage source

At different values of potential

Both (B) and (D)

The strength of magnetic field at certain points around a wire depends upon:

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Value of current passing

Distance from the current element

Color of the material

Both (A) and (B)

Both (B) and (C)

When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:

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Decreases

Increases

Remains the constant

Either of these

None of these

The electric flux through any surface depends upon:

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Intensity of electric field

Area of the surface

Angle between intensity and area

All of these

None of these

The fourth band is a:

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Silver band

Red band

Gold band

Either A or C

Either A or B

The emf is measured in:

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Newton

Volt

J/C

Both A and B

Both B and C

Kirchhoff's first rule is also called:

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Loop rule

Thumb rule

Point rule

Right hand rule

None of these

The quantity having the same unit as that of emf is:

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Force

Energy

Potential

Current

Charge

Aluminum is a:

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Good insulator

Bad conductor

Both (A) and (B)

Excellent conductor

Semiconductor

Xerography means:

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Dry writing

Wet writing

Poor writing

Excellent writing

Both (A) and (B)

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