ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

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ECAT Pre General Science Physics Chapter 14 Electromagnetism

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Question # 1

The voltage increases linearly with

Question # 2

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 3

Ammeter is used to measure

Question # 4

In the formula B= µ̻ nl, the symbol n denotes:

Question # 5

Strength of magnetic field is measured in SI units, in:

Question # 6

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 7

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Question # 8

For the conversion of galvanometer into voltmeter, we connect a

Question # 9

Magnetic induction is also called as:

Question # 10

Galvanometer is a device used for the detection of

Question # 11

The SI unit of magnetic flux is

Question # 12

A voltmeter is used to measure the

Question # 13

CRO deflects the beam of

Question # 14

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

Question # 15

The CRO deflects the beam of electrons, when they passes through uniform

Question # 16

A shunt resistance parallel to the galvanometer is used to convert it into

Question # 17

Tesla is the unit of

Question # 18

The angle of deflection of coil can be measured by the

Question # 19

Which one of the following relations is correct?

Question # 20

The current sensitivity of the galvanometer is

Question # 21

if the field is directed along the normal to the area, then flux is:

Question # 22

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 23

When current passes through a solenoid coil, it behaves like a

Question # 24

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

Question # 25

In a straight current carrying conductor, the direction of magnetic field can be found by

Question # 26

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Question # 27

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 28

A beam of electrons is provided by an

Question # 29

A full-scale deflection is obtained in a galvanometer with a current of few

Question # 30

In the region surrounding a current carrying wire:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
2 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
3 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
4 The unit of flux density is also given by
A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
5 When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is
A. 90°
B. 75°
C. 0°
D. 180°
6 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
7 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
8 If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is
A. F = B2
B. F = 0
C. F = B
D. F = B/2
9 In a straight current carrying conductor, the direction of magnetic field can be found by
A. right hand rule
B. left hand rule
C. head to tall rule
D. none of these
10 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these

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