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

Question # 1

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

No lines cross this area
A
Maximum lines pass through this area
B
The number of lines are between zero and maximum
C
Both (A) and (B) correct
D
None of these
E

Question # 2

Electric field lines emerge from the charge in:

One dimension
A
Two dimensions
B
Three dimensions
C
Four dimensions
D
None of them
E

Question # 3

The device which can convert heat energy into electrical energy is called:

Thermistor
A
Thermometer
B
Thermostat
C
Thermocouple
D
Both (C) and (D)
E

Question # 4

In case of metallic conductors, the charge carriers are

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

Question # 5

The free electrons in metals:

Are in random motion and their speed depends upon temperature
A
Move in particular direction
B
Move with speed of light
C
Move such that their speed does not depend on their temperature
D
None of these
E

Question # 6

Which instrument is expensive and difficult to use?

Voltmeter A
Potentiometer B
CRO C
Both A and C D
Both A and B E

Question # 7

A thermistor is a resistor which is:

Light Sensitive A
Heat Sensitive B
Sound Sensitive C
All of these D
None of these E

Question # 8

An important part of photocopier is:

Toner cartridge
A
Deflection plates
B
Charging electrode
C
Print head
D
None of these
E

Question # 9

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

Cell
A
Voltmeter
B
Thermocouple
C
Potentiometer
D
None of these E

Question # 10

The best conductor is:

Silver A
Copper B
Aluminimum C
Both B and C D
None of them E

Question # 11

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

The ends of the wire only
A
Mid points of the wire only
B
Every point within the wire
C
At nodes only
D
Both (B) and (D)
E

Question # 12

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 # 13

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 # 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

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 # 16

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

Greater than the speed at which they pass from left to right
A
Less than the speed at which they pass from left to right
B
The same speed at which they pass from left to right
C
Any of above
D
None of them
E

Question # 17

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 # 18

A rheostat can e used:

As variable resistor A
As potential divider B
For varying the current C
All of these D
None of these E

Question # 19

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 # 20

The current that flows through the coil of a motor causes

Its shaft to revolve A
Its brushes to rotate B
Motor to move C
Its shaft to rotate D
None of these E

Question # 21

Gaussian surface is always:

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

Question # 22

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 # 23

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 # 24

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 # 25

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

Chemical energy
A
Mechanical energy
B
Heat energy
C
Both (A) and (B)
D
All of these
E

Question # 26

The current that flows through the coil of a motor causes:

Its shaft to revolve
A
Its brushes to rotate
B
Motor to move
C
Its shafts to rotate
D
None of these
E

Question # 27

In gases, the charge carriers are:

Electrons A
Positive ions B
Negative ions C
Both A and C D
Both A and B E

Question # 28

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 # 29

An important part of inkjet printer is:

Toner A
Drum
B
Deflection plates
C
Heated roles
D
None of these
E

Question # 30

Most practical application of electricity involve

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

Sr.#	Question	Answer
1	Another mean of electric potential energy per unit charge is given by:	A. Electric intensity B. Potential gradient C. Electric Flux D. Potential difference
2	The charge carries in the electrolyte are:	A. Positive ions B. Negative ions C. Either (A) or (B) D. Both (A) and (B)
3	Most practical applications of electricity involve	A. Charges at rest B. Charges in motion C. Electrons at rest D. Atoms in motion
4	The inkjet printer ejects a thin stream of:	A. Water B. Oil C. Ink D. Any of above
5	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
6	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
7	The surface destiny of charge is defined is:	A. Charge per volume B. Mass per volume C. Charge per area D. Mass per area
8	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)
9	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)
10	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)

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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