ECAT Pre General Science Physics Chapter 13 MCQ Test With Answer

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

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

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ECAT Pre General Science Physics Chapter 13 Current Electricity

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Question # 1

Electric field lines emerge from the charge in:

Question # 2

An eV is unit of:

Question # 3

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

Question # 4

The passage of current is accompanied by a magnetic field in the surrounding space:

Question # 5

Most practical application of electricity involve

Question # 6

In gases, the charge carriers are:

Question # 7

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

Question # 8

In a metal, the valence electrons are:

Question # 9

Aluminum is a:

Question # 10

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

Question # 11

The flux through a closed surface depends upon:

Question # 12

The best conductor is:

Question # 13

The obvious effect/s of current is/are:

Question # 14

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

Question # 15

The emf is measured in:

Question # 16

Selenium is:

Question # 17

In case of metallic conductors, the charge carriers are

Question # 18

Conversion of chemical energy to electrical energy can be achieved by:

Question # 19

An ideal voltmeter has:

Question # 20

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

Question # 21

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

Question # 22

The value of relative permittivity of different dielectrics are:

Question # 23

Heating effect of current utilized in:

Question # 24

The interior of a hollow charged metal sphere is a region which:

Question # 25

The free electrons in metals:

Question # 26

The charge carriers in an electrolyte are

Question # 27

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

Question # 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:

Question # 29

SI unit of current describes the flow of charge at the rate of

Question # 30

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

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Sr.# Question Answer
1 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
2 The emf is measured in:
A. Newton
B. Volt
C. J/C
D. Both A and B
3 The fourth band is a:
A. Silver band
B. Red band
C. Gold band
D. Either A or C
4 In case of metallic conductors, the charge carriers are
A. Protons
B. Electrons
C. Antiprotons
D. Positrons
5 Aluminum is a:
A.

Good insulator

B.

Bad conductor

C.

Both (A) and (B)

D.

Excellent conductor
6

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
7 In gases, the charge carriers are:
A. Electrons
B. Positive ions
C. Negative ions
D. Both A and C
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 The quantity having the same unit as that of emf is:
A. Force
B. Energy
C. Potential
D. Current
10 Kirchhoff's first rule is also called:
A. Loop rule
B. Thumb rule
C. Point rule
D. Right hand rule
11 The surface destiny of charge is defined is:
A.

Charge per volume

B.

Mass per volume

C.

Charge per area

D.

Mass per area
12 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
13

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

One coulomb

B.

0.5 coulomb

C.

30 coulomb

D.

2 coulombs
14

The charge carries in the electrolyte are:
A.

Positive ions

B.

Negative ions

C.

Either (A) or (B)

D.

Both (A) and (B)
15 A thermistor is a resistor which is:
A. Light Sensitive
B. Heat Sensitive
C. Sound Sensitive
D. All of these
16

An inkjet printer uses in its operation:
A.

Neutrons only

B.

Mesons only

C.

Positrons and photons

D.

An electric charge
17 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
18 Which of the following substances has got positive temperature coefficient of resistance?
A. Carbon
B. Germanium
C. Silicon
D. Aluminium
19 When a constant potential difference is applied across the conductor, the drift velocity of electrons:
A.

Increases

B.

Decreases

C.

Remains the constant

D.

Either of these
20 An important part of photocopier is:
A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head
21 An ideal voltmeter has:
A. Zero resistance
B. Small resistance
C. Large resistance
D. Infinite resistance
22 In case of metallic conductors, the charge carriers are
A. Protons
B. Electrons
C. Antiprotons
D. Positrons
23 SI unit of current describes the flow of charge at the rate of
A. One ampere per second
B. One coulomb per second
C. One electron per second
D. 6.25 x 1018electrons per second
24

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

Cell

B.

Voltmeter

C.

Thermocouple

D.

Potentiometer
25 Field lines are closer to each other in the region where the field is:
A.

Stronger

B.

Weaker

C.

Much weaker

D.

Absent
26 An important part of inkjet printer is:
A. Toner
B.

Drum

C.

Deflection plates

D.

Heated roles
27 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)
28 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
29 A field free region is found:
A.

Near the outer surface of a hollow charged metal sphere

B.

In the interior of solid metal uncharged sphere

C.

In the interior of solid metal charged sphere

D.

Both (A) and (B)
30 The charge carriers in an electrolyte are
A. Positive ions
B. Negative ions
C. Either A or B
D. Both A and B

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