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

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

Question # 2

The unit of magnetic flux is

Question # 3

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

Question # 4

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

Question # 5

The SI unit of magnetic induction is

Question # 6

Which one of the following relations is correct?

Question # 7

Which is modified form of galvanometer

Question # 8

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

Question # 9

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

Question # 10

In the region surrounding a current carrying wire:

Question # 11

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 # 12

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

Question # 13

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

Question # 14

The current is measured in

Question # 15

Charge to mass ratio (e/m) of an electron is given by the relation

Question # 16

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

Question # 17

Centripetal force for electron is given by

Question # 18

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

Question # 19

In a moving coil galvanometer, the deflecting couple depends upon

Question # 20

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

Question # 21

Lorentz force is defined as

Question # 22

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

Question # 23

The CRO is used for displaying the waveform of a given

Question # 24

The torque per unit twist of coil is called

Question # 25

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

Question # 26

Amperean path is a:

Question # 27

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

Question # 28

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

Question # 29

Weber is a unit of

Question # 30

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
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 field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid
4 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
5 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
6 The angle of deflection of coil can be measured by the
A. one method
B. three method
C. two method
D. none of these
7 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these
8 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density
9 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
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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