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

00:00
Question # 1

A resistance used in voltmeter is called

Question # 2

The magnetic field outside the solenoid due to current is

Question # 3

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Question # 4

Resistance is measured in

Question # 5

if the field is directed along the normal to the area, then flux is:

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

A field is uniform and much stronger:

Question # 8

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 # 9

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

Question # 10

A charged particle moving at right angle to the magnetic field will experience

Question # 11

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

Question # 12

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 13

In the region surrounding a current carrying wire:

Question # 14

Weber is a unit of

Question # 15

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 # 16

The strength of magnetic field around the current conductor is

Question # 17

Ammeter is used to measure

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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 # 23

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

Question # 24

For the conversion of galvanometer into voltmeter, we connect a

Question # 25

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

Question # 26

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

Question # 27

A full-scale deflection is obtained in a galvanometer with a current of few

Question # 28

Magnetic induction is also called as:

Question # 29

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 # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
2 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
3 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
4 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
5 The CRO deflects the beam of electrons, when they passes through uniform
A. electric field
B. gravitational field
C. magnetic flax
D. magnetic field
6 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant
7 The SI unit of magnetic induction is tesla which is equal to
A. Newton/ampere-meter or N/A-m
B. Newton/ampere2-meter or N/A2-m
C. Newton/ampere2-meter2 or N/A2-m2
D. Newton/ampere2-meter2or N/A2-m2
8 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
9 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
10 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these

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