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

Question # 1

Another mean of electric potential energy per unit charge is given by:

Electric intensity
A
Potential gradient
B
Electric Flux
C
Potential difference
D
None of these
E

Question # 2

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 # 3

In gases, the charge carries are:

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

Question # 4

Flux through a closed surface of any shape and flux through the surface of a sphere drawn around a charge are:

Different
A
Same
B
Such that it is greater in the first case
C
Such that it is greater in the second case
D
None of these
E

Question # 5

As the current flow through the wire:

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

Question # 6

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 # 7

Xerography means:

Dry writing
A
Wet writing
B
Poor writing
C
Excellent writing
D
Both (A) and (B)
E

Question # 8

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 # 9

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 # 10

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 # 11

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 # 12

Heating effect of current utilized in:

Electric motor
A
Electric toaster
B
Electroplating
C
Electric kettle
D
Both (B) and (D)
E

Question # 13

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 # 14

An important part of photocopier is:

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

Question # 15

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 # 16

The value of relative permittivity of different dielectrics are:

Equal
A
Different
B
Greater than one
C
Smaller than one
D
Both (B) and (C)
E

Question # 17

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

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

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

Carbon A
Germanium B
Silicon C
Aluminium D
None of these E

Question # 20

An important part of inkjet printer is:

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

Question # 21

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 # 22

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

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

Question # 23

In case of metallic conductors, the charge carriers are

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

Question # 24

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 # 25

An ideal voltmeter has:

Zero resistance A
Small resistance B
Large resistance C
Infinite resistance D
Both A and B E

Question # 26

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 # 27

Aluminum is a:

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

Question # 28

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 # 29

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 # 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	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
2	The quantity having the same unit as that of emf is:	A. Force B. Energy C. Potential D. Current
3	Two dissimilar metals joined at their ends kept at constant temperature constitute:	A. Cell B. Voltmeter C. Thermocouple D. Potentiometer
4	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
5	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
6	An important part of photocopier is:	A. Toner cartridge B. Deflection plates C. Charging electrode D. Print head
7	A rheostat can e used:	A. As variable resistor B. As potential divider C. For varying the current D. All of these
8	Most practical applications of electricity involve	A. Charges at rest B. Charges in motion C. Electrons at rest D. Atoms in motion
9	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
10	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

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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