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

A beam of electrons is provided by an

Question # 2

Magnetic flux and flux density are related by

Question # 3

Flurescent screen is a screen where visible spot

Question # 4

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

Question # 5

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

Question # 6

Electron gun consist of

Question # 7

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 # 8

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

Question # 9

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

Question # 10

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 11

Weber is a unit of

Question # 12

The magnetic field inside a solenoid can be increased by:

Question # 13

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 14

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

Question # 15

The SI unit of magnetic permeability is

Question # 16

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

Question # 17

The strength of magnetic field around the current conductor is

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 22

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

Question # 23

Which one of the following relations is correct?

Question # 24

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

Question # 25

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 # 26

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

Question # 27

The field around a moving charge is called

Question # 28

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 # 29

The force acting on a charge moving in a magnetic field

Question # 30

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 How many number of anodes used in electron gun
A. one
B. two
C. three
D. six
3 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
4 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
5 Avo-meter is used of measure the
A. current, voltage
B. voltage, resistance
C. resistance, current
D. current, voltage and resistance
6 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
7 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
8 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
9 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
10 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these

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