ECAT Pre Engineering Physics Chapter 13 MCQ Test With Answer

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

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 13 Current Electricity

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Physics ECAT Pre Engineering Chapter 13 Current Electricity

00:00
Question # 1

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

Question # 2

Magnetic effect of current is used:

Question # 3

Electrolysis is the study of conduction of electricity through:

Question # 4

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

Question # 5

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

Question # 6

The value of resistivity is the least for:

Question # 7

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

Question # 8

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

Question # 9

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:

Question # 10

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

Question # 11

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

Question # 12

Electric field lines emerge from the charge in:

Question # 13

An example of photoconductor is:

Question # 14

In case of metallic conductors, the charge carriers are

Question # 15

In a metal, the valence electrons are:

Question # 16

The electric flux through any surface depends upon:

Question # 17

An inkjet printer uses in its operation:

Question # 18

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

Question # 19

The strength of magnetic field at certain points around a wire depends upon:

Question # 20

Electric flux is:

Question # 21

Tick the correct statement:

Question # 22

The surface destiny of charge is defined is:

Question # 23

In gases, the charge carriers are:

Question # 24

The obvious effect/s of current is/are:

Question # 25

An eV is unit of:

Question # 26

Gaussian surface is always:

Question # 27

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

Question # 28

Most practical application of electricity involve

Question # 29

Which instrument is expensive and difficult to use?

Question # 30

The best conductor is:

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Sr.# Question Answer
1 The positive charge moving in one direction is equivalent in all external affects to a:
A.

Negative charge is moving in the same direction

B.

Positive charge is moving in the opposite direction

C.

Negative charge moving in the opposite direction

D.

Positive charges moving in the same direction
2

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

Zero

B.

Much larger

C.

Larger

D.

Smaller
3

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

Cell

B.

Voltmeter

C.

Thermocouple

D.

Potentiometer
4 As the current flows through the wire
A. It generates heat in the wire
B. It produces sound in the wire
C. Resistance of the wire decrease
D. Voltage across the ends is the increase
5 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
6 Which instrument is expensive and difficult to use?
A. Voltmeter
B. Potentiometer
C. CRO
D. Both A and C
7

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
8

The charge carries in the electrolyte are:
A.

Positive ions

B.

Negative ions

C.

Either (A) or (B)

D.

Both (A) and (B)
9 An important part of photocopier is:
A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head
10 The current that flows through the coil of a motor causes
A. Its shaft to revolve
B. Its brushes to rotate
C. Motor to move
D. Its shaft to rotate

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