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

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

Question # 2

CRO deflects the beam of

Question # 3

In the region surrounding a current carrying wire:

Question # 4

The voltage increases linearly with

Question # 5

A galvanometer is an instrument used to

Question # 6

Which one of the following relations is correct?

Question # 7

How many number of anodes used in electron gun

Question # 8

Magnetic flux and flux density are related by

Question # 9

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

Question # 10

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

Question # 11

The magnetic field inside a solenoid can be increased by:

Question # 12

A current carrying conductor sets up its own:

Question # 13

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

Question # 14

The vector representation of force experience give the direction of

Question # 15

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

Question # 16

Magnetic lines of force:

Question # 17

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

Question # 18

The magnetic field outside the solenoid due to current is

Question # 19

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

Question # 20

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

Question # 21

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 # 22

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

Question # 23

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 # 24

The strength of magnetic field around the current conductor is

Question # 25

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

Question # 26

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Question # 27

It is customary represent a current flowing towards the reader by a symbol

Question # 28

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

Question # 29

The field around a moving charge is called

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
2 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
3 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
4 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
5 Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:
A.

Thumb

B.

Curled fingers

C.

Middle finger

D.

Arm of right hand
6 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
7 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
8 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
9 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
10 The galvanometer can be made sensitive if the value of the factor C/BAN is
A. constant
B. small
C. large
D. none of these

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