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 flux is:

Question # 2

Which instrument is expensive and difficult to use?

Question # 3

If the ends of a wire are connected to a battery an electric field E will be set up at:

Question # 4

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

Question # 5

When certain area A is held parallel to the field lines, then:

Question # 6

Xerography means:

Question # 7

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

Question # 8

The device which can convert heat energy into electrical energy is called:

Question # 9

The free electrons in metals:

Question # 10

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

Question # 11

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

Question # 12

Selenium is:

Question # 13

The value of relative permittivity of different dielectrics are:

Question # 14

In case of metallic conductors, the charge carriers are

Question # 15

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

Question # 16

Kirchhoff's first rule is also called:

Question # 17

The magnitude of chemical Effects depends upon:

Question # 18

The current that flows through the coil of a motor causes

Question # 19

An ideal voltmeter has:

Question # 20

In a metal, the valence electrons are:

Question # 21

Magnetic effect of current is used:

Question # 22

Heating effect of current utilized in:

Question # 23

An important part of inkjet printer is:

Question # 24

An electric field is generated along the wire when:

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Thermistors are prepared under

Question # 29

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

Question # 30

Another mean of electric potential energy per unit charge is given by:

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Sr. # Question Answer
1

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
2 An eV is unit of:

A.

Potential

B.

Energy

C.

Work

D.

Power
3 A rheostat can e used:

A. As variable resistor

B. As potential divider

C.For varying the current

D. All of these

4 The value of resistivity is the least for:

A. Copper

B. Aluminimum

C.Silver

D. Tungsten

5 Magnetic effect of current is used:

A.

In electric motor

B.

To detect current

C.

To measure current

D.

All of these
6 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

7 The inkjet printer ejects a thin stream of:

A.

Water

B.

Oil

C.

Ink

D.

Any of above
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 In gases, the charge carriers are:

A. Electrons

B. Positive ions

C.Negative ions

D. Both A and C

10 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
11 Which of the following substances has got positive temperature coefficient of resistance?

A. Carbon

B. Germanium

C.Silicon

D. Aluminium

12 The value of relative permittivity of different dielectrics are:

A.

Equal

B.

Different

C.

Greater than one

D.

Smaller than one
13

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 shafts to rotate
14 Most practical applications of electricity involve

A. Charges at rest

B. Charges in motion

C.Electrons at rest

D. Atoms in motion

15 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
16

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

A.

Stronger

B.

Weaker

C.

Much weaker

D.

Absent
18 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
19 A thermistor is a resistor which is:

A. Light Sensitive

B. Heat Sensitive

C.Sound Sensitive

D. All of these

20

The magnitude of chemical Effects depends upon:

A.

Nature of liquid

B.

Quantity of Electricity passed through the liquid

C.

Color of the liquid

D.

Both (A) and (C)
21

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
22 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
23 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)
24 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
25 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
26

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)
27 In case of metallic conductors, the charge carriers are

A. Protons

B. Electrons

C.Antiprotons

D. Positrons

28 An ideal voltmeter has:

A. Zero resistance

B. Small resistance

C.Large resistance

D. Infinite resistance

29 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
30

Heating effect of current utilized in:

A.

Electric motor

B.

Electric toaster

C.

Electroplating

D.

Electric kettle

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