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 resistance used in voltmeter is called

Question # 2

A beam of electrons is provided by an

Question # 3

NmA-1 is commonly called:

Question # 4

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

Question # 5

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

Question # 6

Weber is a unit of

Question # 7

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 # 8

The CRO is used for displaying the waveform of a given

Question # 9

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

Question # 10

A current carrying conductor sets up its own:

Question # 11

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

Question # 12

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Question # 13

The sources of magnetic field are

Question # 14

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

Question # 15

The current sensitivity of the galvanometer is

Question # 16

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

Question # 17

The gavanometer constant of a moving coil galvanometer is given by

Question # 18

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 # 19

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 20

Which is modified form of galvanometer

Question # 21

The torque per unit twist of coil is called

Question # 22

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

Question # 23

Flurescent screen is a screen where visible spot

Question # 24

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 25

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is

Question # 26

A field is uniform and much stronger:

Question # 27

The unit of flux density is also given by

Question # 28

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

Question # 29

Tesla is the unit of

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
3 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
4 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
5 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
6 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
7 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
8 Total number of turns on 0.15 m length solenoid is 300. the value of n is:
A. Greater than 300
B. Smaller than 300
C. Equal to 300
D. Any of (A) or (B)
9 A relationship between Gauses of magnetic induction and Tesla(T) is given by
A. G 10-3T
B. G = 10-2T
C. G = 10-4T
D. G = 10-1T
10 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

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