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

Question # 1

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

Decreasing from zero to maximum
A
Increasing from zero to maximum
B
Decreasing from maximum to zero
C
Increasing from maximum to zero
D
Both (A) and (D)
E

Question # 2

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

Positrons A
Positive charges
B
Negative charges
C
Both (A) and (C)
D
None of these
E

Question # 3

The fourth band is a:

Silver band A
Red band B
Gold band C
Either A or C D
Either A or B E

Question # 4

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

Connected to a laser source
A
Connected to a voltage source
B
Not connected to a voltage source
C
At different values of potential
D
Both (B) and (D)
E

Question # 5

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 # 6

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 # 7

An example of photoconductor is:

Boron
A
Carbon
B
Iron
C
Aluminum
D
Selenium
E

Question # 8

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

Flux in that region
A
Intensity of the field
B
Charge
C
Area of the region
D
None of these
E

Question # 9

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 # 10

The magnitude of chemical Effects depends upon:

Nature of liquid
A
Quantity of Electricity passed through the liquid
B
Color of the liquid
C
Both (A) and (C)
D
Both (A) and (B)
E

Question # 11

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 # 12

The electric flux through any surface depends upon:

Intensity of electric field
A
Area of the surface
B
Angle between intensity and area
C
All of these
D
None of these
E

Question # 13

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 # 14

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 # 15

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 # 16

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 # 17

Gaussian surface is always:

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

Question # 18

The charge carries in the electrolyte are:

Positive ions
A
Negative ions
B
Either (A) or (B)
C
Both (A) and (B)
D
Neither (A) nor (B)
E

Question # 19

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

Straight lines
A
Sine curves
B
Curved
C
Both (A) and (B)
D
None of these
E

Question # 20

The charge carriers in an electrolyte are

Positive ions A
Negative ions B
Either A or B C
Both A and B D
Neither A nor B E

Question # 21

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 # 22

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 # 23

An electric field is generated along the wire when:

Its resistance is very high
A
A constant potential is maintained across the wire
B
Net current through the wire is zero
C
A constant potential difference is maintained across the wire
D
Either (A) or (D)
E

Question # 24

Most practical applications of electricity involve

Charges at rest A
Charges in motion B
Electrons at rest C
Atoms in motion D
Molecules in motion E

Question # 25

The quantity having the same unit as that of emf is:

Force A
Energy B
Potential C
Current D
Charge E

Question # 26

The third band of the colour code:

Gives the number of zeroes A
Is decimal multiplier B
Gives the resistance tolerance C
Gives the third digit D
Both (A) and (B) E

Question # 27

As the current flows through the wire

It generates heat in the wire A
It produces sound in the wire B
Resistance of the wire decrease C
Voltage across the ends is the increase D
None of these E

Question # 28

In case of metallic conductors, the charge carriers are

Protons A
Electrons B
Antiprotons C
Positrons D
Both A and B E

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	A thermistor is a resistor which is:	A. Light Sensitive B. Heat Sensitive C. Sound Sensitive D. All of these
2	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
3	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
4	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
5	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
6	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
7	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)
8	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)
9	Which instrument is expensive and difficult to use?	A. Voltmeter B. Potentiometer C. CRO D. Both A and C
10	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)

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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