ECAT Pre General Science Physics Chapter 13 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 13 Current Electricity

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 13 Current Electricity

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ECAT Pre General Science Physics Chapter 13 Current Electricity

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Question # 1

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

Question # 2

Electrolysis is the study of conduction of electricity through:

Question # 3

A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s

Question # 4

Electric flux is:

Question # 5

An important part of inkjet printer is:

Question # 6

In case of metallic conductors, the charge carriers are

Question # 7

A field free region is found:

Question # 8

In order to have a constant current through wire, the potential difference across its end should:

Question # 9

In a metal, the valence electrons are:

Question # 10

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

Question # 11

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

Question # 12

Which instrument is expensive and difficult to use?

Question # 13

An eV is unit of:

Question # 14

In case of metallic conductors, the charge carriers are

Question # 15

The flux through a closed surface depends upon:

Question # 16

Kirchhoff's first rule is also called:

Question # 17

The surface destiny of charge is defined is:

Question # 18

Most practical applications of electricity involve

Question # 19

In a metal, the valence electrons are:

Question # 20

Which of the following substances has got positive temperature coefficient of resistance?

Question # 21

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

Question # 22

An inkjet printer uses in its operation:

Question # 23

Xerography means:

Question # 24

An example of photoconductor is:

Question # 25

As the current flows through the wire

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

As the current flow through the wire:

Question # 30

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

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Sr. # Question Answer
1 Static electricity is produced by the transfer of:

A.

Electrons

B.

Protons

C.

One fluid

D.

Two fluids

2 A field free region is found:

A.

Near the outer surface of a hollow charged metal sphere

B.

In the interior of solid metal uncharged sphere

C.

In the interior of solid metal charged sphere

D.

Both (A) and (B)

3 The electric flux through any surface depends upon:

A.

Intensity of electric field

B.

Area of the surface

C.

Angle between intensity and area

D.

All of these

4

Certain charge +q is placed at the center of a sphere. At each of the sphere,The directions of electric intensity and vector area are:

A.

Same

B.

Different

C.

Opposite to each other

D.

At 60º with each other

5

An inkjet printer uses in its operation:

A.

Neutrons only

B.

Mesons only

C.

Positrons and photons

D.

An electric charge

6 As the current flow through the wire:

A.

It generates heat in the wire

B.

It produces sound in the wire

C.

Resistance of the wire decreases

D.

Voltage across the ends is increased

7 The value of resistivity is the least for:

A. Copper

B. Aluminimum

C.Silver

D. Tungsten

8

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

A.

Thermistor

B.

Thermometer

C.

Thermostat

D.

Thermocouple

9 A thermistor is a resistor which is:

A. Light Sensitive

B. Heat Sensitive

C.Sound Sensitive

D. All of these

10 The free electrons in metals:

A.

Are in random motion and their speed depends upon temperature

B.

Move in particular direction

C.

Move with speed of light

D.

Move such that their speed does not depend on their temperature

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

A.

Always accompanied

B.

Sometimes accompanied

C.

Never accompanied

D. Any of above

12

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

A.

Both the conductors are at the same potential

B.

Potential difference across the conductors remain constant

C.

Potential difference across the conductors becomes zero

D.

Both (A) and (B)

13 The inkjet printer ejects a thin stream of:

A.

Water

B.

Oil

C.

Ink

D.

Any of above

14

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

A.

Primary cell

B.

Secondary cell

C.

Both (A) and (B)

D.

Photovoltaic cell

15 An electric field is generated along the wire when:

A.

Its resistance is very high

B.

A constant potential is maintained across the wire

C.

Net current through the wire is zero

D.

A constant potential difference is maintained across the wire

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

A.

Increases

B.

Decreases

C.

Remains the constant

D.

Either of these

17 A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s

A. One coulomb

B. 0.5 coulomb

C.30 coulombs

D. 2 coulombs

18 The value of relative permittivity of different dielectrics are:

A.

Equal

B.

Different

C.

Greater than one

D.

Smaller than one

19 Selenium is:

A.

An insulator

B.

A conductor

C.

Insulator in the dark and becomes conductor when exposed to light

D.

Conductor in the dark only

20

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

A.

Its shaft to revolve

B.

Its brushes to rotate

C.

Motor to move

D.

Its shafts to rotate

21

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

A.

Chemical energy

B.

Mechanical energy

C.

Heat energy

D.

Both (A) and (B)

22

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

A.

Both the conductors are at the same potential

B.

Potential difference across the conductors remain constant

C.

Potential difference across the conductors becomes zero

D.

Both (A) and (B)

23

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

A.

One coulomb

B.

0.5 coulomb

C.

30 coulomb

D.

2 coulombs

24 An important part of photocopier is:

A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head

25

In case of metallic conductors, the change carries are:

A.

Protons

B.

Electrons

C.

Antiprotons

D.

Positrons

26

In order to have a constant current through wire, the potential difference across its end should:

A.

Be zero

B.

Be maintained constant

C.

Goes on increasing

D.

Go on decreasing

27 In a metal, the valence electrons are:

A.

Attach to individual atoms

B.

Not attached to individual atoms

C.

Free to move within the metal

D.

Both (A) and (C)

28 The charge carriers in an electrolyte are

A. Positive ions

B. Negative ions

C.Either A or B

D. Both A and B

29 Xerography means:

A.

Dry writing

B. Wet writing

C.

Poor writing

D.

Excellent writing

30

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

A.

Cell

B.

Voltmeter

C.

Thermocouple

D.

Potentiometer

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