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

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Question # 2

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 3

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

Question # 4

The current is measured in

Question # 5

Which is modified form of galvanometer

Question # 6

The sources of magnetic field are

Question # 7

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 # 8

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 9

The angle of deflection of coil can be measured by the

Question # 10

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

Question # 11

Magnetic flux and flux density are related by

Question # 12

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:

Question # 13

The torque per unit twist of coil is called

Question # 14

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 # 15

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

Question # 16

A resistance used in voltmeter is called

Question # 17

The SI unit of magnetic flux is.

Question # 18

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

Question # 19

A charged particle moving at right angle to the magnetic field will experience

Question # 20

The permeability of free space is measured in:

Question # 21

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

Question # 22

How many number of anodes used in electron gun

Question # 23

F = I(L x B) is a

Question # 24

A long wire wound tightly on a cylindrical core is called:

Question # 25

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

Question # 26

The force acting on a charge moving in a magnetic field

Question # 27

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 28

Resistance is measured in

Question # 29

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 30

The CRO is used for displaying the waveform of a given

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:
A. Maximum
B. Minimum
C. Zero
D. Very small
3 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them
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 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
6 To convert galvanometer into ammeter we connect
A. small resistance in parallel with galvanometer
B. small resistance in series with galvanometer
C. high resistance in series with galvanometer
D. high resistance in parallel with galvanometer
7 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter
8 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
9 A current carrying conductor sets up its own:
A.

Electric field

B.

Nuclear field

C.

Magnetic field

D.

Both (A) and (C)
10 The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above

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