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

Xerography means:

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

Question # 3

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 # 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

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 # 6

Selenium is:

An insulator
A
A conductor
B
Insulator in the dark and becomes conductor when exposed to light
C
Conductor in the dark only
D
None of these
E

Question # 7

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 # 8

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 # 9

The value of resistivity is the least for:

Copper A
Aluminimum B
Silver C
Tungsten D
Iron E

Question # 10

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 # 11

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 # 12

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 # 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

Gaussian surface is always:

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

Question # 15

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 # 16

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 # 17

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 # 18

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 # 19

The obvious effect/s of current is/are:

Heating effect
A
Magnetic effect
B
Chemical effect
C
Both (C) and (B)
D
All of these
E

Question # 20

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 # 21

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 # 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

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 # 24

The inkjet printer ejects a thin stream of:

Water
A
Oil
B
Ink
C
Any of above
D
None of these
E

Question # 25

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 # 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

While finding the electric intensity at a point between two oppositely charged parallel plates, the Gaussian surface is taken in the form of a hollow:

Circle
A
Rectangle
B
Sphere
C
Box
D
Cylinder
E

Question # 28

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

Question # 29

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 # 30

In case of metallic conductors, the charge carriers are

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

Sr. #	Question	Answer
1	The number of field lines passing through unit area held perpendicular to the field lines represent:	A. Flux in that region B. Intensity of the field C. Charge D. Area of the region
2	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
3	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
4	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
5	Most practical application of electricity involve	A. Charges at the rest B. Charges in the motion C. Electrons at rest D. Atoms in motion
6	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
7	The third band of the colour code:	A. Gives the number of zeroes B. Is decimal multiplier C.Gives the resistance tolerance D. Gives the third digit
8	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
9	In case of metallic conductors, the charge carriers are	A. Protons B. Electrons C.Antiprotons D. Positrons
10	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)
11	An important part of photocopier is:	A. Toner cartridge B. Deflection plates C. Charging electrode D. Print head
12	As the current flow through the wire:	A. It generates heat in the wire B. It produces sound in the wire C. Resistance of the wire decreases D. Voltage across the ends is increased
13	Electrostatics is the branch of physics which deals with the study of electro charges:	A. At rest B. At rest under the action of electric forces C. In motion under the action of electric forces D. In motion
14	Electric field lines emerge from the charge in:	A. One dimension B. Two dimensions C. Three dimensions D. Four dimensions
15	The charge carriers in an electrolyte are	A. Positive ions B. Negative ions C.Either A or B D. Both A and B
16	An ideal voltmeter has:	A. Zero resistance B. Small resistance C.Large resistance D. Infinite resistance
17	Gaussian surface is always:	A. Rectangular B. Spherical C. Cylindrical D. Box shape
18	Xerography means:	A. Dry writing B. Wet writing C. Poor writing D. Excellent writing
19	In gases, the charge carries are:	A. Electrons B. Positive ions C. Negative ions D. Both (A) and (C)
20	An important part of inkjet printer is:	A. Toner B. Drum C. Deflection plates D. Heated roles
21	The effects of bends in a wire on its electrical resistance are:	A. Zero B. Much larger C. Larger D. Smaller
22	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
23	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)
24	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
25	In gases, the charge carriers are:	A. Electrons B. Positive ions C.Negative ions D. Both A and C
26	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)
27	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
28	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:	A. Same B. Different C. Opposite to each other D. At 60º with each other
29	The inkjet printer ejects a thin stream of:	A. Water B. Oil C. Ink D. Any of above
30	A rheostat can e used:	A. As variable resistor B. As potential divider C.For varying the current D. All of these

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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