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

In the expression of force experienced by electron, the direction of both v and B are

Question # 2

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 3

The vector representation of force experience give the direction of

Question # 4

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 5

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

Question # 6

The current sensitivity of the galvanometer is

Question # 7

F = I(L x B) is a

Question # 8

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 9

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

Question # 10

The torque per unit twist of coil is called

Question # 11

The force experienced by charged particle is maximum, if it moves

Question # 12

The sources of magnetic field are

Question # 13

The SI unit of flux density is

Question # 14

The angle of deflection of coil can be measured by the

Question # 15

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 # 16

The CRO is used for displaying the waveform of a given

Question # 17

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 # 18

How many number of anodes used in electron gun

Question # 19

magnetic field is a:

Question # 20

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

Question # 21

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 22

For the conversion of galvanometer into voltmeter, we connect a

Question # 23

The SI unit of magnetic flux is.

Question # 24

The SI unit of magnetic induction is

Question # 25

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

Question # 26

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 27

The current is measured in

Question # 28

A field is uniform and much stronger:

Question # 29

Ammeter is used to measure

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer
2 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
3 A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called
A. dead beat galvanometer
B. stable galvanometer
C. shunt galvanometer
D. sensitive galvanomter
4 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
5 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
6 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
7 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
8 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
9 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
10 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density

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