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

The CRO is used for displaying the waveform of a given

Question # 2

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 # 3

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

Question # 4

Weber is a unit of

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Strength of magnetic field is measured in SI units, in:

Question # 9

The strength of magnetic field around the current conductor is

Question # 10

A field is uniform and much stronger:

Question # 11

Which one of the following relations is correct?

Question # 12

The sources of magnetic field are

Question # 13

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

Question # 14

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 # 15

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 # 16

Galvanometer is a device used for the detection of

Question # 17

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 18

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

Question # 19

NmA-1 is commonly called:

Question # 20

A long wire wound tightly on a cylindrical core is called:

Question # 21

A galvanometer is an instrument used to

Question # 22

A resistance used in voltmeter is called

Question # 23

For the conversion of galvanometer into voltmeter, we connect a

Question # 24

Amperean path is a:

Question # 25

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

Question # 26

magnetic field is a:

Question # 27

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

Question # 28

The magnetic field outside the solenoid due to current is

Question # 29

Lorentz force is defined as

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 NmA-1 is commonly called:
A. Weber
B. Apmere
C. Guass
D. Coulomb
2 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
3

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
4 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
5 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
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
A. magnetic flux
B. magnetic induction
C. magnetic field
D. self inductance
7 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter
8 Avo-meter is used of measure the
A. current, voltage
B. voltage, resistance
C. resistance, current
D. current, voltage and resistance
9 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer
10 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2

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