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

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

Question # 2

The unit of flux density is also given by

Question # 3

The most suitable material for permanent magnet is

Question # 4

Method "lamp and scale arrangement" used to measure the

Question # 5

The magnetic field outside the solenoid due to current is

Question # 6

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 # 7

The unit of magnetic flux is

Question # 8

Tesla is the unit of

Question # 9

Ammeter is used to measure

Question # 10

Lorentz force is defined as

Question # 11

Which is modified form of galvanometer

Question # 12

The torque per unit twist of coil is called

Question # 13

A beam of electrons is provided by an

Question # 14

Magnetic lines of force:

Question # 15

The field around a moving charge is called

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 force experienced by charged particle is maximum, if it moves

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 22

Amperean path is a:

Question # 23

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

Question # 24

Magnetic induction is also called as:

Question # 25

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

Question # 26

To convert galvanometer into ammeter we connect

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

In a moving coil galvanometer, the deflecting couple depends upon

Question # 29

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The current is measured in
A. volts
B. watt
C. ampere
D. ohm
2 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
3 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
4 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made
A. Sensitive
B. Accurate
C. Stable
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 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
7 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
8 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
9 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
10 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:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth

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