Magnetism and Matter - Online Test
Q1. A short bar magnet placed with its axis at with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to J. What is the magnitude of magnetic moment of the magnet?
Answer : Option B
Explaination / Solution:
No Explaination.
Q2.
A closely wound solenoid of 800 turns and area of cross section carries a current of 3.0 A. What is its associated magneticm oment?
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. A closely wound solenoid of 800 turns and area of cross section carries a current of 3.0 A.It is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied.Magnitude of torque on the solenoid when its axis makes an angle of with the direction of applied field
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. A bar magnet of magnetic moment 1.5 J/T lies aligned with the direction of a uniform magnetic field of 0.22 T. What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment normal to the field direction?
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. A bar magnet of magnetic moment 1.5 J/T lies aligned with the direction of a uniform magnetic field of 0.22 T. What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment opposite to the field direction?
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. A bar magnet of magnetic moment 1.5 J/T lies perpendicular to the direction of a uniform magnetic field of 0.22 T. What is the torque acting on it?
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. A bar magnet of magnetic moment 1.5 J/T lies parallel to the direction of a uniform magnetic field of 0.22 T. What is the torque acting on it?
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. A closely wound solenoid of 2000 turns and area of cross-section , carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. What is the magnetic moment associated with the solenoid?
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. A closely wound solenoid of 2000 turns and area of cross-section , carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. If a uniform horizontal magnetic field of T is set up at an angle of with the axis of the solenoid,force and torque on the solenoid are
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. A short bar magnet has a magnetic moment of 0.48 J/T .Magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on the axis has a direction and magnitude of .
Answer : Option B
Explaination / Solution:
No Explaination.
