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

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

Question # 2

The value of relative permittivity of different dielectrics are:

Question # 3

An ideal voltmeter has:

Question # 4

In a metal, the valence electrons are:

Question # 5

The value of resistivity is the least for:

Question # 6

In gases, the charge carriers are:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Electric field lines emerge from the charge in:

Question # 11

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

Question # 12

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

Question # 13

In case of metallic conductors, the charge carriers are

Question # 14

In case of metallic conductors, the charge carriers are

Question # 15

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

Question # 16

Static electricity is produced by the transfer of:

Question # 17

Which instrument is expensive and difficult to use?

Question # 18

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

Question # 19

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

Question # 20

The surface destiny of charge is defined is:

Question # 21

The number of field lines passing through unit area held perpendicular to the field lines represent:

Question # 22

Gaussian surface is always:

Question # 23

The flux through a closed surface depends upon:

Question # 24

The fourth band is a:

Question # 25

The charge carriers in an electrolyte are

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

A thermistor is a resistor which is:

Question # 30

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

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Sr.# Question Answer
1 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
2 Most practical applications of electricity involve
A. Charges at rest
B. Charges in motion
C. Electrons at rest
D. Atoms in motion
3 The inkjet printer ejects a thin stream of:
A.

Water

B.

Oil

C.

Ink

D.

Any of above
4 An electric field is generated along the wire when:
A.

Its resistance is very high

B.

A constant potential is maintained across the wire

C.

Net current through the wire is zero

D.

A constant potential difference is maintained across the wire
5

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:
A.

Circle

B.

Rectangle

C.

Sphere

D.

Box
6 An important part of photocopier is:
A.

Toner cartridge

B. Deflection plates

C.

Charging electrode

D.

Print head
7

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
8 Selenium is:
A.

An insulator

B.

A conductor

C.

Insulator in the dark and becomes conductor when exposed to light

D.

Conductor in the dark only
9 Kirchhoff's first rule is also called:
A. Loop rule
B. Thumb rule
C. Point rule
D. Right hand rule
10 The quantity having the same unit as that of emf is:
A. Force
B. Energy
C. Potential
D. Current
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 Which instrument is expensive and difficult to use?
A. Voltmeter
B. Potentiometer
C. CRO
D. Both A and C
13 An important part of inkjet printer is:
A. Toner
B.

Drum

C.

Deflection plates

D.

Heated roles
14 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
15

In case of metallic conductors, the change carries are:
A.

Protons

B.

Electrons

C.

Antiprotons

D.

Positrons
16 Xerography means:
A.

Dry writing

B. Wet writing

C.

Poor writing

D.

Excellent writing
17 Magnetic effect of current is used:
A.

In electric motor

B.

To detect current

C.

To measure current

D.

All of these
18

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

Cell

B.

Voltmeter

C.

Thermocouple

D.

Potentiometer
19 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
20 The fourth band is a:
A. Silver band
B. Red band
C. Gold band
D. Either A or C
21

An inkjet printer uses in its operation:
A.

Neutrons only

B.

Mesons only

C.

Positrons and photons

D.

An electric charge
22 An ideal voltmeter has:
A. Zero resistance
B. Small resistance
C. Large resistance
D. Infinite resistance
23 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
24

The obvious effect/s of current is/are:
A.

Heating effect

B.

Magnetic effect

C.

Chemical effect

D.

Both (C) and (B)
25 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
26 Most practical application of electricity involve
A.

Charges at the rest

B.

Charges in the motion

C.

Electrons at rest

D.

Atoms in motion
27 A thermistor is a resistor which is:
A. Light Sensitive
B. Heat Sensitive
C. Sound Sensitive
D. All of these
28 When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:
A.

Decreases

B.

Increases

C.

Remains the constant

D.

Either of these
29

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

Zero

B.

Much larger

C.

Larger

D.

Smaller
30 Static electricity is produced by the transfer of:
A.

Electrons

B.

Protons

C.

One fluid

D.

Two fluids

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