Question # 1

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 effects of bends in a wire on its electrical resistance are:

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Zero

Much larger

Larger

Smaller

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

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

A rheostat can e used:

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As variable resistor

As potential divider

For varying the current

All of these

None of these

If the ends of a wire are connected to a battery an electric field E will be set up at:

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The ends of the wire only

Mid points of the wire only

Every point within the wire

At nodes only

Both (B) and (D)

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)

When two spherical conducting balls at different potentials are joined by metallic wire, the current starts:

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Decreasing from zero to maximum

Increasing from zero to maximum

Decreasing from maximum to zero

Increasing from maximum to zero

Both (A) and (D)

The magnitude of chemical Effects depends upon:

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Nature of liquid

Quantity of Electricity passed through the liquid

Color of the liquid

Both (A) and (C)

Both (A) and (B)

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

The third band of the colour code:

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Gives the number of zeroes

Is decimal multiplier

Gives the resistance tolerance

Gives the third digit

Both (A) and (B)

Conversion of chemical energy to electrical energy can be achieved by:

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Primary cell

Secondary cell

Both (A) and (B)

Photovoltaic cell

Solar cell

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

The free electrons in metals:

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Are in random motion and their speed depends upon temperature

Move in particular direction

Move with speed of light

Move such that their speed does not depend on their temperature

None of these

The inkjet printer ejects a thin stream of:

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Water

Oil

Ink

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)

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