Magnetism(General Knowledge > General Science ) Questions and Answers

Question 1. For which of the following is magnetic susceptibility negative?
  1.    Diamagnetic Materials
  2.    Ferromagnetic Materials only
  3.    Paramagnetic Materials only
  4.    Paramagnetic and Ferromagnetic materials
Explanation:-
Answer: Option A. -> Diamagnetic Materials
Question 2. Indicate which of the following material does not retain magnetism permanently
  1.    Soft iron
  2.    Stainless steel
  3.    Hardened steel
  4.    None of the above
Explanation:-
Answer: Option A. -> Soft iron
Question 3. Which of the following materials is the most suitable for making a permanent magnet?
  1.    Steel
  2.    Copper
  3.    Nickel
  4.    Soft Iron
Explanation:-
Answer: Option A. -> Steel
Question 4. A long magnet is cut into two parts such that the ratio of their lengths is 2:1
  1.    1:2
  2.    2:1
  3.    4:1
  4.    Equal
Explanation:-
Answer: Option D. -> Equal
Question 5. What happens to the magnetic moment if a hole is made at the centre of a bar magnet?
  1.    Decreases
  2.    Increases
  3.    Not a change
  4.    None of the above
Explanation:-
Answer: Option C. -> Not a change
Question 6. Which of the following is expected to have the maximum permeability?
  1.    Brass
  2.    Copper
  3.    Zinc
  4.    Ebonite
Explanation:-
Answer: Option D. -> Ebonite
Question 7. Magnetic lines of force of a bar magnet do not intersect because
  1.    The lines need magnetic lenses to intersect
  2.    A point always has a single net magnetic field
  3.    The lines always diverge from a single point
  4.    The lines have similar charges hence they repel each other
Explanation:-
Answer: Option B. -> A point always has a single net magnetic field
Question 8. In a moving coil galvanometer, we use a radial magnetic field so that the galvanometer scale is
  1.    linear
  2.    algebraic
  3.    exponential
  4.    logarithmic
Explanation:-
Answer: Option A. -> linear
Question 9. Which of the following has higher magnetic susceptibility?
  1.    paramagnetic
  2.    ferromagnetic
  3.    diamagnetic
  4.    None of these
Explanation:-
Answer: Option B. -> ferromagnetic
Question 10. Basic source of magnetism
  1.    Charged particles alone
  2.    Movement of charged particles
  3.    Magnetic dipoles
  4.    Magnetic domains
Explanation:-
Answer: Option A. -> Charged particles alone
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