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

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

Question # 2

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

Question # 3

Kirchhoff's first rule is also called:

Question # 4

In a metal, the valence electrons are:

Question # 5

Selenium is:

Question # 6

Aluminum is a:

Question # 7

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

Question # 8

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

Question # 9

In gases, the charge carries are:

Question # 10

The obvious effect/s of current is/are:

Question # 11

An electric field is generated along the wire when:

Question # 12

The magnitude of chemical Effects depends upon:

Question # 13

Static electricity is produced by the transfer of:

Question # 14

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

Question # 15

Electrolysis is the study of conduction of electricity through:

Question # 16

In case of metallic conductors, the charge carriers are

Question # 17

The value of relative permittivity of different dielectrics are:

Question # 18

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 # 19

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

Question # 20

The flux through a closed surface depends upon:

Question # 21

The best conductor is:

Question # 22

The emf is measured in:

Question # 23

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

Question # 24

An eV is unit of:

Question # 25

In a metal, the valence electrons are:

Question # 26

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

Question # 27

As the current flow through the wire:

Question # 28

When certain area A is held parallel to the field lines, then:

Question # 29

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

Question # 30

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

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Sr.# Question Answer
1

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

2 Static electricity is produced by the transfer of:
A.

Electrons

B.

Protons

C.

One fluid

D.

Two fluids

3 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

4 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

5 The charge carriers in an electrolyte are
A. Positive ions
B. Negative ions
C. Either A or B
D. Both A and B
6

Heating effect of current utilized in:

A.

Electric motor

B.

Electric toaster

C.

Electroplating

D.

Electric kettle

7 An important part of photocopier is:
A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head

8

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

9

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

10 Thermistors are prepared under
A. High pressure and low temperature
B. High pressure and high temperature
C. Low pressure and low temperature
D. Low pressure and high temprature
11 In a metal, the valence electrons are:
A. Attached to individual atoms
B. Not attached to individual atoms
C. Free to move within the metal
D. Both A and B
12 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

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 Most practical applications of electricity involve
A. Charges at rest
B. Charges in motion
C. Electrons at rest
D. Atoms in motion
15 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

16 Kirchhoff's first rule is also called:
A. Loop rule
B. Thumb rule
C. Point rule
D. Right hand rule
17

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

A.

Cell

B.

Voltmeter

C.

Thermocouple

D.

Potentiometer

18

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)

19 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 shaft to rotate
20 The term drift velocity is used when the ends of a wire are:
A.

Connected to a laser source

B.

Connected to a voltage source

C.

Not connected to a voltage source

D.

At different values of potential

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

Contain some magnitude of electric field

B.

Is full of electric field lines

C.

Is field-free region

D.

Either (A) or (B)

22 Which of the following substances has got positive temperature coefficient of resistance?
A. Carbon
B. Germanium
C. Silicon
D. Aluminium
23 Tick the correct statement:
A.

Both the potential and potential difference is scalars

B.

Potential is a scalar but potential difference is a vector

C. Both are vectors

D.

Potential is vector but potential difference is scalar

24 When certain area A is held parallel to the field lines, then:
A.

No lines cross this area

B.

Maximum lines pass through this area

C.

The number of lines are between zero and maximum

D.

Both (A) and (B) correct

25 In case of metallic conductors, the charge carriers are
A. Protons
B. Electrons
C. Antiprotons
D. Positrons
26 In gases, the charge carriers are:
A. Electrons
B. Positive ions
C. Negative ions
D. Both A and C
27 Aluminum is a:
A.

Good insulator

B.

Bad conductor

C.

Both (A) and (B)

D.

Excellent conductor

28 An example of photoconductor is:
A.

Boron

B.

Carbon

C.

Iron

D.

Aluminum

29 The fourth band is a:
A. Silver band
B. Red band
C. Gold band
D. Either A or C
30 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

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