36. Which of the following is not a property of diamagnetic materials?
a) They are weakly repelled by a magnet
b) They become weakly magnetized in the presence of a magnetic field
c) They have a net magnetic moment even in the absence of a magnetic field
d) They lose their magnetism when the external magnetic field is removed
37. Which of the following is not a property of ferromagnetic materials?
a) They are strongly attracted to a magnet
b) They become strongly magnetized in the presence of a magnetic field
c) They have a net magnetic moment even in the absence of a magnetic field
d) They lose their magnetism when the external magnetic field is removed
38. Which of the following is not a property of permanent magnets?
a) They can be magnetized
b) They can retain their magnetism for a long time
c) They can be demagnetized
d) They can generate an electric current
39. Which of the following is not a property of electromagnets?
a) They can be magnetized
b) They can retain their magnetism for a long time
c) They can be demagnetized
d) They can generate an electric current
40. The strength of the magnetic field around a current-carrying wire depends on:
a) The length of the wire
b) The diameter of the wire
c) The material of the wire
d) The distance from the wire
