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Online Tests
MDCAT Physics Chapter 8 Electromagnetism Online Test MCQs With Answers
Question # 1
A magnetic field
Choose an answer
Always exerts a force on a charged particle
Never exerts a force on a charged particle
Exerts a force on a charged particle if it is moving across the magnetic lines of force
Exerts a force on a charged particle if it is moving along the magnetic lines of force.
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Question # 2
A long solenoid has 20 turns/ cm. The current necessary to produce a magnetic field of 20 mellites inside the solenoid is approximately:
Choose an answer
1A
2A
4A
8A
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Question # 3
Charge to mass ratio (e/m) of a charge particle is also called its:
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Specific charge
Specific Force
Gyro-magnetic ratio
Magneto-mechanical ratio
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Question # 4
A tritium and alpha particle enter the magnetic field with same kinetic energy, what will be the ratio of their radii?
Choose an answer
3:4
√3: 1
√3: 4
√3:√2
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Question # 5
If an electron vertically downwards, then the horizontal component of the earth’s magnetic field will deflect it to wards
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West
East
North
North
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Question # 6
The magnetic field of a solenoid is quite similar to that of a:
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Straight conductor
A horse shoe magne
Any magnet
A bar magnet
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Question # 7
The magnetic field due to the electric current in a conducting wire is:
Choose an answer
Towards the centre of the conducting wire
Circular around the conducting wire
In the direction of the electric current
In the direction opposite to the electric current
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Question # 8
A straight current carrying conductor experiences maximum forces in a uniform magnetic field when it is placed:
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Parallel to the field
Perpendicular o the field
At an angle of 45 to the field
None of these
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Question # 9
An electron and a proton are projected at right angles to a uniform magnetic field with
Choose an answer
the electron trajectory will be less curved than proton’s trajectory
the electron trajectory will be more curved than proton’s trajectory
) both trajectories will be equally curved
) both particles continue to move along a straight lins
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Question # 10
The direction of force experienced by a moving in a magnetic field will be:
Choose an answer
Parallel to the field
Opposite to the field
Parallel to its direction of motion
Perpendicular to both the field and the velocity vector
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Question # 11
A positively charged particle is moving perpendicular to a uniform magnetic field. The magnetic force makes the particle to move along:
Choose an answer
An elliptical path
A circular path
A parabolic path
None of these
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Question # 12
Magnetic field inside a solenoid is:
Choose an answer
) Directly proportional to current
Inversely proportional to current
Directly proportional to its length
Inversely proportional to total no of turns
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Question # 13
The magnetic field produced due to the current in a straight wire is proportionalto the :
Choose an answer
Electric current
Conducting material
Length of the wire
Diameter of the wire
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Question # 14
A source of a magnetic field is:
Choose an answer
An isolated magnetic
A static electric charge
A moving electric charge
None of these
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Question # 15
Which one of the following particles projected perpendicular to a uniform magnetic field with the same velocity will be deflected least?
Choose an answer
Electron
Proton
Deuton
None of these
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