ECAT Pre Computer Science Chapter 13 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 13 Current Electricity

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

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ECAT Physics Chapter 13 Current Electricity

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Question # 1

As the current flow through the wire:

Question # 2

Most practical applications of electricity involve

Question # 3

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 # 4

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

Question # 5

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

Question # 6

In case of metallic conductors, the charge carriers are

Question # 7

The best conductor is:

Question # 8

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

Question # 9

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

Question # 10

An electric field is generated along the wire when:

Question # 11

The positive charge moving in one direction is equivalent in all external affects to a:

Question # 12

In order to have a constant current through wire, the potential difference across its end should:

Question # 13

In a metal, the valence electrons are:

Question # 14

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

Question # 15

Gaussian surface is always:

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Sr.# Question Answer
1 In a metal, the valence electrons are:
A.

Attach to individual atoms

B.

Not attached to individual atoms

C.

Free to move within the metal

D.

Both (A) and (C)
2 The interior of a hollow charged metal sphere is a region which:
A.

Contain some magnitude of electric field

B.

Is full of electric field lines

C.

Is field-free region

D.

Either (A) or (B)
3 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
4

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)
5

The charge carries in the electrolyte are:
A.

Positive ions

B.

Negative ions

C.

Either (A) or (B)

D.

Both (A) and (B)
6 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
7

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)
8 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
9 In a metal, the valence electrons are:
A. Attached to individual atoms
B. Not attached to individual atoms
C. Free to move within the metal
D. Both A and B
10 Aluminum is a:
A.

Good insulator

B.

Bad conductor

C.

Both (A) and (B)

D.

Excellent conductor
11 Tick the correct statement:
A.

Both the potential and potential difference is scalars

B.

Potential is a scalar but potential difference is a vector

C. Both are vectors

D.

Potential is vector but potential difference is scalar
12 A thermistor is a resistor which is:
A. Light Sensitive
B. Heat Sensitive
C. Sound Sensitive
D. All of these
13 Which of the following substances has got positive temperature coefficient of resistance?
A. Carbon
B. Germanium
C. Silicon
D. Aluminium
14 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
15 The value of relative permittivity of different dielectrics are:
A.

Equal

B.

Different

C.

Greater than one

D.

Smaller than one

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