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

00:00
Question # 1

The obvious effect/s of current is/are:

Question # 2

Tick the correct statement:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

In gases, the charge carriers are:

Question # 7

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

Question # 8

The free electrons in metals:

Question # 9

Heating effect of current utilized in:

Question # 10

The number of field lines passing through unit area held perpendicular to the field lines represent:

Question # 11

Most practical application of electricity involve

Question # 12

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:

Question # 13

Selenium is:

Question # 14

The flux through a closed surface depends upon:

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

As the current flows through the wire

Question # 19

The magnitude of chemical Effects depends upon:

Question # 20

An inkjet printer uses in its operation:

Question # 21

The electric flux through any surface depends upon:

Question # 22

The fourth band is a:

Question # 23

In case of metallic conductors, the charge carriers are

Question # 24

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

Question # 25

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

Question # 26

Thermistors are prepared under

Question # 27

The charge carriers in an electrolyte are

Question # 28

In gases, the charge carries are:

Question # 29

In case of metallic conductors, the charge carriers are

Question # 30

Electric flux is:

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Sr. # Question Answer
1 Electric field lines emerge from the charge in:

A.

One dimension

B.

Two dimensions

C.

Three dimensions

D.

Four dimensions
2 The inkjet printer ejects a thin stream of:

A.

Water

B.

Oil

C.

Ink

D.

Any of above
3 Static electricity is produced by the transfer of:

A.

Electrons

B.

Protons

C.

One fluid

D.

Two fluids
4 An important part of photocopier is:

A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head
5 The surface destiny of charge is defined is:

A.

Charge per volume

B.

Mass per volume

C.

Charge per area

D.

Mass per area
6

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

A.

Decreasing from zero to maximum

B.

Increasing from zero to maximum

C.

Decreasing from maximum to zero

D.

Increasing from maximum to zero
7

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

A.

At rest

B.

At rest under the action of electric forces

C.

In motion under the action of electric forces

D.

In motion
8 A rheostat can e used:

A. As variable resistor

B. As potential divider

C.For varying the current

D. All of these

9 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

10 In case of metallic conductors, the charge carriers are

A. Protons

B. Electrons

C.Antiprotons

D. Positrons

11 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
12 The third band of the colour code:

A. Gives the number of zeroes

B. Is decimal multiplier

C.Gives the resistance tolerance

D. Gives the third digit

13 In gases, the charge carriers are:

A. Electrons

B. Positive ions

C.Negative ions

D. Both A and C

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

A. Positrons

B.

Positive charges

C.

Negative charges

D.

Both (A) and (C)
15 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
16 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
17

An inkjet printer uses in its operation:

A.

Neutrons only

B.

Mesons only

C.

Positrons and photons

D.

An electric charge
18

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
19

In case of metallic conductors, the change carries are:

A.

Protons

B.

Electrons

C.

Antiprotons

D.

Positrons
20

The magnitude of chemical Effects depends upon:

A.

Nature of liquid

B.

Quantity of Electricity passed through the liquid

C.

Color of the liquid

D.

Both (A) and (C)
21 Which instrument is expensive and difficult to use?

A. Voltmeter

B. Potentiometer

C.CRO

D. Both A and C

22

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

A.

The ends of the wire only

B.

Mid points of the wire only

C.

Every point within the wire

D.

At nodes only
24 The positive charge moving in one direction is equivalent in all external affects to a:

A.

Negative charge is moving in the same direction

B.

Positive charge is moving in the opposite direction

C.

Negative charge moving in the opposite direction

D.

Positive charges moving in the same direction
25 Another mean of electric potential energy per unit charge is given by:

A.

Electric intensity

B.

Potential gradient

C.

Electric Flux

D.

Potential difference
26 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

27 An example of photoconductor is:

A.

Boron

B.

Carbon

C.

Iron

D.

Aluminum
28 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
29 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)
30

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

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