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 current is pass through the straight wire. The magnetic field established around it has its lines of force:

Question # 2

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 # 3

A beam of electrons is provided by an

Question # 4

The permeability of free space is measured in:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The direction of lines of force depends upon the direction of

Question # 9

The current sensitivity of the galvanometer is

Question # 10

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

Question # 11

Resistance is measured in

Question # 12

A field is uniform and much stronger:

Question # 13

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

Question # 14

The sources of magnetic field are

Question # 15

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

Question # 16

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

Question # 17

The pointer of a magnetic compass:

Question # 18

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

Question # 19

For the conversion of galvanometer into voltmeter, we connect a

Question # 20

The strength of magnetic field around the current conductor is

Question # 21

The force acting on a charge moving in a magnetic field

Question # 22

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 # 23

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

Question # 24

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

Question # 25

The most suitable material for permanent magnet is

Question # 26

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 # 27

Avo-meter is used of measure the

Question # 28

magnetic field is a:

Question # 29

Method "lamp and scale arrangement" used to measure the

Question # 30

The torque per unit twist of coil is called

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 To convert galvanometer into ammeter we connect
A. small resistance in parallel with galvanometer
B. small resistance in series with galvanometer
C. high resistance in series with galvanometer
D. high resistance in parallel with galvanometer
2 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
3 Galvanometer is a device used for the detection of
A. voltage
B. current
C. temperature
D. pressure
4 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
5 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
6 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
7 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
8 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero
9 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
10 The unit of magnetic flux is
A. Weber-m2
B. Weber-m3
C. Henry
D. Weber

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