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- 1. Multiple Choice
The force exerted on a current carrying wire placed in a magnetic field is zero when the angle between wire and the direction of magnetic field is
45o
60o
90o
180o
- 2. Multiple Choice
An induced emf is produced when a magnet is moved into a coil. The magnitude of induced emf does not depend on
The speed with which the magnet is moved
The number of turns of the coil
The resistivity of the wire of the coil
The strength of the magnet
- 3. Multiple Choice
A positive charge is moving towards a person. The direction of magnetic field lines will be in
Clockwise direction
Anticlockwise direction
Vertically upward direction
Vertically downward direction
- 4. Multiple Choice
Which of the following statement is not correct about the magnetic field?
Magnetic field lines form a continuous closed curve
Magnetic field line do not interest each other.
Direction of tangent at any point on the magnetic field line curve gives the direction of magnetic field at that point
Outside the magnet, magnetic field lines go from South to North pole of the magnet.
- 5. Multiple Choice
The strength of magnetic field around a current carrying conductor is
inversely proportional to the current but directly proportional to the square of the distance from wire
proportional to the current and inversely proportional to the distance from wire
directly proportional to the distance and inversely proportional to the current
directly proportional to the current but inversely proportional the square of the distance from wire.
- 6. Multiple Choice
A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid
will decrease
will remains same
will increase
will become zero
- 7. Multiple Choice
A proton is projected with a uniform velocity ‘v’ along the axis of a current carrying solenoid, then
the proton will be accelerated along the axis
the proton path will be circular about the axis
the proton move along helical path
the proton will continue to move with velocity ‘v’ along the axis
- 8. Multiple Choice
Which of the following is true?
Magnetic field exerts force only a moving charge
Electric field exerts force only on stationary charge
Magnetic field exerts force on charge moving parallel to the direction of the field
All the above
- 9. Multiple Choice
Which of the following is true about the motion of the particle in the magnetic field ?
Force will always be perpendicular to the velocity
The magnitude of the velocity remains constant
Velocity vector and magnetic field vector remains perpendicular to each other during the motion
All of the above
- 10. Multiple Choice
If the beams of electrons and protons move parallel to each other in the same direction, then they
attract each other.
repel each other
no relation.
neither attract nor repel.
- 11. Multiple Choice
An electron is projected along the axis of a circular conductor carrying the same current. Electron will experience
a force along the axis.
a force perpendicular to the axis.
a force at an angle of 45° with axis
no force experienced
- 12. Multiple Choice
In a circular coil of radius r, the magnetic field at the centre is proportional to
Independent of r
- 13. Multiple Choice
When a magnetic compass needle is carried nearby to a straight wire carrying current, then
Statement I: the straight wire cause a noticeable deflection in the compass needle.
Statement II: the alignment of the needle is tangential to an imaginary circle with straight wire as its centre and has a plane perpendicular to the wire
Statement I is correct
Statement II is correct
Both statements I and II are correct
Neither statements I nor II is correct
- 14. Multiple Choice
A strong magnetic field is applied on a stationary electron. Then the electron
moves in the direction of the field.
remained stationary.
moves perpendicular to the direction of the field.
moves opposite to the direction of the field.
- 15. Multiple Choice
Current flows through uniform, square frames as shown in the figure. In which case is the magnetic field at the centre of the frame not zero?
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