Magnetism and Matter - Online Test
Q1. Nitric oxide is a paramagnetic compound. The magnetic moment of each NO molecule has a maximum component in any direction of about one Bohr magneton.Interaction energy of such magnetic moments in a 1.5-T magnetic field is
Answer : Option A
Explaination / Solution:
No Explaination.
Q2. A cube-shaped permanent magnet is made of a ferromagnetic material with a magnetization M of about The side length is 2 cm. Magnetic dipole moment of the magnet is.
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. A cube-shaped permanent magnet is made of a feromagnetic matrerial with a magnetization M of about The side length is 2 cm. Magnetic field due to the magnet at a point 10 cm from the magnet along its axis is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. permeability of a paramagnetic material is expected to decrease with increasing temperature because
Answer : Option B
Explaination / Solution:
No Explaination.
Q5. If a magnet is suspended over a container of liquid air, it attracts droplets to its poles. The droplets contain only liquid oxygen and no nitrogen because
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. which of the following features of atomic structure determine whether an element is diamagnetic or paramagnetic
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. Correct unit of Bohr magneton is
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. Diamagnetic susceptibilities are very nearly temperature independent because
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. An iron bar magnet of length 10cm and cross section 1 has a magnetization of . Magnet's pole strength is
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. A cylinder of iron is placed so that it is free to rotate around its axis. Initially the cylinder is at rest, and a magnetic field is applied to the cylinder so that it is magnetized in a direction parallel to its axis. If the direction of the external field is suddenly reversed, the direction of magnetization will also reverse and the cylinder will begin rotating around its axis because
Answer : Option D
Explaination / Solution:
No Explaination.
