Question # 1

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

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

In gases, the charge carries are:

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Electrons

Positive ions

Negative ions

Both (A) and (C)

Both (A) and (B)

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 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)

An electric field is generated along the wire when:

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Its resistance is very high

A constant potential is maintained across the wire

Net current through the wire is zero

A constant potential difference is maintained across the wire

Either (A) or (D)

In gases, the charge carriers are:

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Electrons

Positive ions

Negative ions

Both A and C

Both A and B

The value of resistivity is the least for:

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Copper

Aluminimum

Silver

Tungsten

Iron

The interior of a hollow charged metal sphere is a region which:

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Contain some magnitude of electric field

Is full of electric field lines

Is field-free region

Either (A) or (B)

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

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

The charge carriers in an electrolyte are

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Positive ions

Negative ions

Either A or B

Both A and B

Neither A nor B

Electrostatics is the branch of physics which deals with the study of electro charges:

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At rest

At rest under the action of electric forces

In motion under the action of electric forces

In motion

At rest under the action of nuclear forces

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 flux through a closed surface depends upon:

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Shape of geometry of the closed surface

Charge enclosed

Nature of the medium

Both (A) and (B)

Both (B) and (C)

In case of two identical charges placed certain distance apart, the electric field lines are:

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Straight lines

Sine curves

Curved

Both (A) and (B)

None of these

The conventional current is the name given to current due to flow of:

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Positrons

Positive charges

Negative charges

Both (A) and (C)

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

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

SI unit of current describes the flow of charge at the rate of

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One ampere per second

One coulomb per second

One electron per second

6.25 x 10¹⁸electrons per second

Both B and D

The obvious effect/s of current is/are:

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Heating effect

Magnetic effect

Chemical effect

Both (C) and (B)

All of these

Heating effect of current utilized in:

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Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

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 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)

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

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 device which can convert heat energy into electrical energy is called:

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Thermistor

Thermometer

Thermostat

Thermocouple

Both (C) and (D)

Static electricity is produced by the transfer of:

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Electrons

Protons

One fluid

Two fluids

None of these

In case of metallic conductors, the change carries are:

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Protons

Electrons

Antiprotons

Positrons

Both (A) and (B)

As the current flows through the wire

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It generates heat in the wire

It produces sound in the wire

Resistance of the wire decrease

Voltage across the ends is the increase

None of these

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