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 e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 2

The SI unit of magnetic permeability is

Question # 3

The unit of magnetic flux is

Question # 4

The magnetic field outside the solenoid due to current is

Question # 5

magnetic field is a:

Question # 6

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 7

Ammeter is used to measure

Question # 8

The SI unit of magnetic induction is tesla which is equal to

Question # 9

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

Question # 10

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 11

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 12

Magnetic lines of force:

Question # 13

NmA-1 is commonly called:

Question # 14

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

Question # 15

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 16

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 17

The torque per unit twist of coil is called

Question # 18

The force acting on a charge moving in a magnetic field

Question # 19

A resistance used in galvanometer to make it voltmeter is called

Question # 20

CRO deflects the beam of

Question # 21

The voltage increases linearly with

Question # 22

A field is uniform and much stronger:

Question # 23

A beam of electrons is provided by an

Question # 24

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

Question # 25

The pointer of a magnetic compass:

Question # 26

Lorentz force is defined as

Question # 27

The SI unit of flux density is

Question # 28

Avo-meter is used of measure the

Question # 29

F = I(L x B) is a

Question # 30

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
2 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
3 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these
4 At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
5 The most suitable material for permanent magnet is
A. cobalt
B. iron
C. steel
D. alaminium
6 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
7 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
8 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
9 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
A. n/AL
B. Al/n
C. nAL
D. nA/L
10 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these

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