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

Ammeter is used to measure

Question # 2

In the region surrounding a current carrying wire:

Question # 3

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

Question # 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

Question # 5

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

Question # 6

Current is measured in

Question # 7

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

Question # 8

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

Question # 9

The SI unit of magnetic flux is.

Question # 10

The SI unit of magnetic flux is

Question # 11

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

Question # 12

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

Question # 13

The SI unit of flux density is.

Question # 14

The torque per unit twist of coil is called

Question # 15

A current carrying conductor sets up its own:

Question # 16

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

Question # 17

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

Question # 18

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 # 19

A beam of electrons is provided by an

Question # 20

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

Question # 21

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 # 22

How many number of anodes used in electron gun

Question # 23

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

Question # 24

Which one of the following relations is correct?

Question # 25

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

Question # 26

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

Question # 27

The voltage increases linearly with

Question # 28

Galvanometer is a device used for the detection of

Question # 29

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

Question # 30

A solenoid is a coil of wire which is:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these
2 Tesla is the unit of
A. Magnetic induction or flux density
B. Magnetic flux
C. Self inductance
D. None of these
3 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
A. magnetic flux
B. magnetic induction
C. magnetic field
D. self inductance
4 A current carrying conductor sets up its own:
A.

Electric field

B.

Nuclear field

C.

Magnetic field

D.

Both (A) and (C)
5 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these
6 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
7 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
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 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum
10 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

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