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

Which one of the following relations is correct?

Question # 2

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

Question # 3

A resistance used in voltmeter is called

Question # 4

A beam of electrons is provided by an

Question # 5

The current is measured in

Question # 6

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 7

The strength of magnetic field around the current conductor is

Question # 8

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

Question # 9

The SI unit of magnetic flux is

Question # 10

How many number of anodes used in electron gun

Question # 11

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

Question # 12

Avo-meter is used of measure the

Question # 13

The force acting on a charge moving in a magnetic field

Question # 14

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

Question # 15

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

Question # 16

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 # 17

A resistance used in galvanometer to make it voltmeter is called

Question # 18

The unit of magnetic flux is

Question # 19

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 # 20

The magnetic field inside a solenoid can be increased by:

Question # 21

The unit of flux density is also given by

Question # 22

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

Question # 23

Ammeter is used to measure

Question # 24

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

Question # 25

In a moving coil galvanometer, the deflecting couple depends upon

Question # 26

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

Question # 27

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 28

The gavanometer constant of a moving coil galvanometer is given by

Question # 29

Weber is a unit of

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
2 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
3 For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as
A. modification
B. voltage
C. current
D. resistance
4 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
5 The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by
A. F=eVB
B. F=e2V/B
C. F=e/VB
D. F=B2/ev
6 In the region surrounding a current carrying wire:
A. A magnetic field is setup

B.

The lines of force are elliptical

C.

Direction of lines of forces depends upon direction of current

D.

Both (A) and (C)
7 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
8 The SI unit of magnetic flux is
A. NmA-2
B. NmA-1
C. NAm-1
D. Nm2A-1
9 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
10 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

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