ECAT Pre General Science Chapter 13 online mcq test with answers for Physics chapter 13 (Current Electricity)

Question # 1

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

Equal
A
Zero
B
First is greater than the second
C
Second is greater than the first
D
Both (A) and (B)
E

Question # 2

Magnetic effect of current is used:

In electric motor
A
To detect current
B
To measure current
C
All of these
D
None of these
E

Question # 3

The surface destiny of charge is defined is:

Charge per volume
A
Mass per volume
B
Charge per area
C
Mass per area
D
Both (B) and (C)
E

Question # 4

Static electricity is produced by the transfer of:

Electrons
A
Protons
B
One fluid
C
Two fluids
D
None of these
E

Question # 5

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

Zero
A
Much larger
B
Larger
C
Smaller
D
None of these
E

Question # 6

The emf is measured in:

Newton A
Volt B
J/C C
Both A and B D
Both B and C E

Question # 7

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

Decreases
A
Increases
B
Remains the constant
C
Either of these
D
None of these
E

Question # 8

The value of resistivity is the least for:

Copper A
Aluminimum B
Silver C
Tungsten D
Iron E

Question # 9

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

Contain some magnitude of electric field
A
Is full of electric field lines
B
Is field-free region
C
Either (A) or (B)
D
None of these
E

Question # 10

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

Be zero
A
Be maintained constant
B
Goes on increasing
C
Go on decreasing
D
Both (A) and (B)
E

Question # 11

In a metal, the valence electrons are:

Attached to individual atoms A
Not attached to individual atoms B
Free to move within the metal C
Both A and B D
Both A and C E

Question # 12

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

Both the conductors are at the same potential
A
Potential difference across the conductors remain constant
B
Potential difference across the conductors becomes zero
C
Both (A) and (B)
D
Both (A) and (C)
E

Question # 13

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:

Same
A
Different
B
Opposite to each other
C
At 60º with each other
D
Both (B) and (C)
E

Question # 14

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

Stronger
A
Weaker
B
Much weaker
C
Absent
D
None of these
E

Question # 15

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

At rest
A
At rest under the action of electric forces
B
In motion under the action of electric forces
C
In motion
D
At rest under the action of nuclear forces
E

Question # 16

In a metal, the valence electrons are:

Attach to individual atoms
A
Not attached to individual atoms
B
Free to move within the metal
C
Both (A) and (C)
D
Both (B) and (C)
E

Question # 17

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

Negative charge is moving in the same direction
A
Positive charge is moving in the opposite direction
B
Negative charge moving in the opposite direction
C
Positive charges moving in the same direction
D
None of these
E

Question # 18

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

Always accompanied
A
Sometimes accompanied
B
Never accompanied
C
Any of above
D
None of these
E

Question # 19

Gaussian surface is always:

Rectangular
A
Spherical
B
Cylindrical
C
Box shape
D
Any of these
E

Question # 20

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

One coulomb A
0.5 coulomb B
30 coulombs C
2 coulombs D
None of these E

Question # 21

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

Increases
A
Decreases
B
Remains the constant
C
Either of these
D
None of these
E

Question # 22

Electric flux is:

Cross product of two vector
A
Dot product of two vectors
B
A vector quantity
C
A scalar quantity
D
Both (B) and (D)
E

Question # 23

A field free region is found:

Near the outer surface of a hollow charged metal sphere
A
In the interior of solid metal uncharged sphere
B
In the interior of solid metal charged sphere
C
Both (A) and (B)
D
Both (A) and (C)
E

Question # 24

The flux through a closed surface depends upon:

Shape of geometry of the closed surface
A
Charge enclosed
B
Nature of the medium
C
Both (A) and (B)
D
Both (B) and (C)
E

Question # 25

Electrolysis is the study of conduction of electricity through:

Solids A
Liquids B
Gases C
Plasma D

Question # 26

An example of photoconductor is:

Boron
A
Carbon
B
Iron
C
Aluminum
D
Selenium
E

Question # 27

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

One ampere per second A
One coulomb per second B
One electron per second C
6.25 x 10¹⁸electrons per second D
Both B and D E

Question # 28

Thermistors are prepared under

High pressure and low temperature A
High pressure and high temperature B
Low pressure and low temperature C
Low pressure and high temprature D
None of these E

Question # 29

Aluminum is a:

Good insulator
A
Bad conductor
B
Both (A) and (B)
C
Excellent conductor
D
Semiconductor
E

Question # 30

Tick the correct statement:

Both the potential and potential difference is scalars
A
Potential is a scalar but potential difference is a vector
B
Both are vectors
C
Potential is vector but potential difference is scalar
D
None of these
E

Sr.#	Question	Answer
1	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
2	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
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 strength of magnetic field at certain points around a wire depends upon:	A. Value of current passing B. Distance from the current element C. Color of the material D. Both (A) and (B)
5	The flux through a closed surface depends upon:	A. Shape of geometry of the closed surface B. Charge enclosed C. Nature of the medium D. Both (A) and (B)
6	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
7	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
8	The best conductor is:	A. Silver B. Copper C. Aluminimum D. Both B and C
9	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
10	The charge carriers in an electrolyte are	A. Positive ions B. Negative ions C. Either A or B D. Both A and B

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ECAT Pre General Science Physics Chapter 13 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 13 Current Electricity

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

Magnetic effect of current is used:

The surface destiny of charge is defined is:

Static electricity is produced by the transfer of:

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

The emf is measured in:

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

The value of resistivity is the least for:

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

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

In a metal, the valence electrons are:

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

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:

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

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

In a metal, the valence electrons are:

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

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

Gaussian surface is always:

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

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

Electric flux is:

A field free region is found:

The flux through a closed surface depends upon:

Electrolysis is the study of conduction of electricity through:

An example of photoconductor is:

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

Thermistors are prepared under

Aluminum is a:

Tick the correct statement:

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