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

The charge carriers in an electrolyte are

Question # 2

In gases, the charge carriers are:

Question # 3

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:

Question # 4

Tick the correct statement:

Question # 5

The positive charge moving in one direction is equivalent in all external affects to a:

Question # 6

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

Question # 7

Static electricity is produced by the transfer of:

Question # 8

A rheostat can e used:

Question # 9

The obvious effect/s of current is/are:

Question # 10

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

Question # 11

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

Question # 12

An important part of photocopier is:

Question # 13

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

Question # 14

Most practical application of electricity involve

Question # 15

The charge carries in the electrolyte are:

Question # 16

Gaussian surface is always:

Question # 17

The third band of the colour code:

Question # 18

Field lines are closer to each other in the region where the field is:

Question # 19

Electrolysis is the study of conduction of electricity through:

Question # 20

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

Question # 21

An electric field is generated along the wire when:

Question # 22

Kirchhoff's first rule is also called:

Question # 23

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

Question # 24

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

Question # 25

Which instrument is expensive and difficult to use?

Question # 26

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

Question # 27

In gases, the charge carries are:

Question # 28

In case of metallic conductors, the change carries are:

Question # 29

Selenium is:

Question # 30

In case of metallic conductors, the charge carriers are

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Sr. # Question Answer
1 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
2

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
3

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

A.

Different

B.

Same

C.

Such that it is greater in the first case

D.

Such that it is greater in the second case
4 In gases, the charge carries are:

A.

Electrons

B.

Positive ions

C.

Negative ions

D.

Both (A) and (C)
5 Magnetic effect of current is used:

A.

In electric motor

B.

To detect current

C.

To measure current

D.

All of these
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 obvious effect/s of current is/are:

A.

Heating effect

B.

Magnetic effect

C.

Chemical effect

D.

Both (C) and (B)
8 SI unit of current describes the flow of charge at the rate of

A. One ampere per second

B. One coulomb per second

C.One electron per second

D. 6.25 x 1018electrons per second

9

Heating effect of current utilized in:

A.

Electric motor

B.

Electric toaster

C.

Electroplating

D.

Electric kettle
10 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
11

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

A.

Straight lines

B.

Sine curves

C.

Curved

D.

Both (A) and (B)
12

An inkjet printer uses in its operation:

A.

Neutrons only

B.

Mesons only

C.

Positrons and photons

D.

An electric charge
13 The surface destiny of charge is defined is:

A.

Charge per volume

B.

Mass per volume

C.

Charge per area

D.

Mass per area
14 The charge carriers in an electrolyte are

A. Positive ions

B. Negative ions

C.Either A or B

D. Both A and B

15

While finding the electric intensity at a point between two oppositely charged parallel plates, the Gaussian surface is taken in the form of a hollow:

A.

Circle

B.

Rectangle

C.

Sphere

D.

Box
16 Static electricity is produced by the transfer of:

A.

Electrons

B.

Protons

C.

One fluid

D.

Two fluids
17 Most practical applications of electricity involve

A. Charges at rest

B. Charges in motion

C.Electrons at rest

D. Atoms in motion

18 An example of photoconductor is:

A.

Boron

B.

Carbon

C.

Iron

D.

Aluminum
19 The value of resistivity is the least for:

A. Copper

B. Aluminimum

C.Silver

D. Tungsten

20

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

A.

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

B.

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

C.

The same speed at which they pass from left to right

D.

Any of above
21 Most practical application of electricity involve

A.

Charges at the rest

B.

Charges in the motion

C.

Electrons at rest

D.

Atoms in motion
22 Aluminum is a:

A.

Good insulator

B.

Bad conductor

C.

Both (A) and (B)

D.

Excellent conductor
23 Field lines are closer to each other in the region where the field is:

A.

Stronger

B.

Weaker

C.

Much weaker

D.

Absent
24

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
25 An important part of photocopier is:

A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head
26 Electrolysis is the study of conduction of electricity through:

A. Solids

B. Liquids

C.Gases

D. Plasma

27 In gases, the charge carriers are:

A. Electrons

B. Positive ions

C.Negative ions

D. Both A and C

28

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)
29 Which instrument is expensive and difficult to use?

A. Voltmeter

B. Potentiometer

C.CRO

D. Both A and C

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

A.

Equal

B.

Zero

C.

First is greater than the second

D.

Second is greater than the first

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