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

CRO deflects the beam of

Question # 2

Centripetal force for electron is given by

Question # 3

How many number of anodes used in electron gun

Question # 4

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

Question # 5

A solenoid is a coil of wire which is:

Question # 6

The magnetic field inside a solenoid can be increased by:

Question # 7

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

Question # 8

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

Question # 9

Avo-meter is used of measure the

Question # 10

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

Question # 11

The SI unit of magnetic flux 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

NmA-1 is commonly called:

Question # 14

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

Question # 15

Current is measured in

Question # 16

A field is uniform and much stronger:

Question # 17

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 # 18

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

Question # 19

A galvanometer is an instrument used to

Question # 20

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

Question # 21

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

Question # 22

A current carrying conductor sets up its own:

Question # 23

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 # 24

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

Question # 25

Lorentz force is defined as

Question # 26

The SI unit of magnetic permeability is

Question # 27

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 28

The SI unit of flux density is

Question # 29

Weber is a unit of

Question # 30

The SI unit of magnetic flux is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these
2 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter
3 The force experienced by charged particle is maximum, if it moves
A. parallel to magnetic field
B. perpendicular to magnetic field
C. opposite to the magnetic field
D. none of these
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 When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
A. changed
B. zero
C. unchanged
D. none of these
6 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
7 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
8 When current passes through a solenoid coil, it behaves like a
A. loop
B. circle
C. bar magnet
D. none of these
9 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
10 The SI unit of magnetic flux is
A. NmA-2
B. NmA-1
C. NAm-1
D. Nm2A-1

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