Q1. In which direction does the magnetic field line emerge from a bar magnet? (2022)
Solution:
Magnetic field lines emerge from the north pole and enter the south pole of a bar magnet.
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Q2. A charged particle moves in a magnetic field. What is the path of the particle if it enters the field perpendicular to the lines of force? (2019)
Solution:
A charged particle moving perpendicular to the magnetic field will follow a circular path due to the magnetic force acting as a centripetal force.
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Q3. Which of the following materials is a ferromagnet? (2023)
Solution:
Iron is a ferromagnetic material, which means it can be magnetized and retains its magnetic properties.
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Q4. If the magnetic field strength is doubled, what happens to the force experienced by a current-carrying conductor? (2022)
Solution:
The force experienced by a current-carrying conductor in a magnetic field is directly proportional to the magnetic field strength. Therefore, if the magnetic field strength is doubled, the force also doubles.
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Q5. In a uniform magnetic field, the magnetic force on a current-carrying conductor is maximum when the angle between the conductor and the field is: (2019)
Solution:
The magnetic force is maximum when the angle between the conductor and the magnetic field is 90 degrees, as sin(90°) = 1.
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Q6. Which of the following materials is considered ferromagnetic? (2022)
Solution:
Iron is considered a ferromagnetic material, which can be magnetized and retains its magnetism.
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Q7. What is the force on a charge moving in a magnetic field given by F = qvB sin(θ)? (2022)
Solution:
The force on a charge moving in a magnetic field is maximum when the angle θ between the velocity vector and the magnetic field is 90°, as sin(90°) = 1.
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Q8. What is the direction of the magnetic field inside a bar magnet? (2023)
Solution:
The direction of the magnetic field inside a bar magnet is from the north pole to the south pole.
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Q9. What is the magnetic field inside a long solenoid when the current is steady? (2023)
Solution:
The magnetic field inside a long solenoid is uniform and parallel to the axis of the solenoid when the current is steady.
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Q10. In a magnetic field, the force on a charged particle is maximum when the angle between the velocity and the magnetic field is: (2019)
Solution:
The force on a charged particle in a magnetic field is maximum when the angle between the velocity and the magnetic field is 90 degrees.
