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

Ammeter is used to measure

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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 # 6

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

Question # 7

The unit of flux density is also given by

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

Resistance is measured in

Question # 10

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 11

The current is measured in

Question # 12

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

Question # 13

When current passes through a solenoid coil, it behaves like a

Question # 14

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 # 15

In a moving coil galvanometer, the deflecting couple depends upon

Question # 16

The magnetic field in the middle of a solenoid due to current is

Question # 17

Lorentz force is defined as

Question # 18

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

Question # 19

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

Question # 20

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 # 21

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

Question # 22

The most suitable material for permanent magnet is

Question # 23

The direction of lines of force depends upon the direction of

Question # 24

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 25

The pointer of a magnetic compass:

Question # 26

Electron gun consist of

Question # 27

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

Question # 28

Which is modified form of galvanometer

Question # 29

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
3 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
4 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
5 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
A. dead beat galvanometer
B. stable galvanometer
C. shunt galvanometer
D. sensitive galvanomter
6 The SI unit of magnetic flux is
A. NmA-2
B. NmA-1
C. NAm-1
D. Nm2A-1
7 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
8 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
9 NmA-1 is commonly called:
A. Weber
B. Apmere
C. Guass
D. Coulomb
10 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these

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