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

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

Question # 2

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

Question # 3

Flurescent screen is a screen where visible spot

Question # 4

Lorentz force is defined as

Question # 5

The angle of deflection of coil can be measured by the

Question # 6

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

Question # 7

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

Question # 8

Magnetic flux and flux density are related by

Question # 9

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

Question # 10

magnetic field is a:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The CRO is used for displaying the waveform of a given

Question # 15

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

Question # 16

Current is measured in

Question # 17

Method "lamp and scale arrangement" used to measure the

Question # 18

Ammeter is used to measure

Question # 19

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

Question # 20

The SI unit of flux density is

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 25

To convert galvanometer into ammeter we connect

Question # 26

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 # 27

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 # 28

Which one of the following relations is correct?

Question # 29

The SI unit of magnetic flux is.

Question # 30

Magnetic lines of force:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
2 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density
3 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G
4 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
5 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
6 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
7 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
8 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these
9 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant
10 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these

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