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Magnetism Fundamentals

Questions about magnetic materials, magnetic poles, attraction and repulsion, demagnetization, electromagnetic induction, and applications of magnetism.

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is the most magnetic?

  1. Ebonite
  2. Magnetite
  3. Cobalt
  4. Nickel
  5. None of these
Question 2 Multiple Choice (Single Answer)

Which of the following is the surest test of magnetism?

  1. Attraction
  2. Rotation
  3. Repulsion
  4. None of these
  5. All of these
Question 3 Multiple Choice (Single Answer)

To which direction does the North end of a freely suspended magnet point?

  1. Geographical North
  2. Geographical South
  3. Geographical East
  4. Geographical West
  5. None of these
Question 4 Multiple Choice (Single Answer)

Which of the following cannot be used to make a magnet?

  1. Cobalt
  2. Iron
  3. Ebonite
  4. Steel
  5. None of these
Question 5 Multiple Choice (Single Answer)

Which of the following results in the loss of magnetism of a magnet?

  1. Keeping in a box
  2. Heating
  3. Hammering
  4. Both (2) & (3)
  5. None of these
Question 6 Multiple Choice (Single Answer)

Which of the following gets demagnetized when a powerful magnet is kept near it?

  1. Plastic Ruler
  2. Compact disc
  3. Glass tumbler
  4. Wood
  5. None of these
Question 7 Multiple Choice (Single Answer)

What happens when unlike poles of a magnet are brought near each other?

  1. Attract
  2. Repel
  3. <font size="2">Rotate clockwise</font>
  4. Rotate anticlockwise
  5. None of these
Question 8 Multiple Choice (Single Answer)

Which of the following devices is used by pilots & navigators to find the direction?

  1. Barometer
  2. Thermometer
  3. Magnetic compass
  4. Magnetic pen
  5. None of these
Question 9 Multiple Choice (Single Answer)

The direction of the force on a current carrying wire in a magnetic field is described by which of the following?

  1. Perpendicular to the current
  2. Perpendicular to the magnetic field
  3. Both (1) & (2) are valid
  4. Neither (1) nor (2) is valid
  5. None of these
Question 10 Multiple Choice (Single Answer)

What will happen, if a magnet is cut into two pieces of equal length?

  1. Both pieces will lose their magnetism.
  2. One piece will act as North Pole and the other as South Pole.
  3. Both pieces will behave as complete magnets.
  4. One of the pieces will lose its magnetism.
Question 11 Multiple Choice (Single Answer)

When a bar magnet immersed in a heap of iron fillings is taken out, it is observed that iron fillings stick to the surface of the bar magnet. The iron fillings would be observed to

  1. stick uniformly throughout the surface of the bar magnet
  2. stick randomly on the surface of bar magnet
  3. have maximum concentration at the two ends of the bar magnet
  4. have maximum concentration slightly away from the two ends of the bar magnet
Question 12 Multiple Choice (Single Answer)

When an electric current flows through a coil and an iron nail is placed inside a coil it behaves like a magnet.When electric current stops flowing through the coil what effect does an iron nail show?

  1. It behaves like a magnet
  2. It will lose its magnetism
  3. It will start rotating clockwise
  4. It will start rotating anti clockwise
  5. None of these
Question 13 Multiple Choice (Single Answer)

A charged particle moves across a constant magnetic field. What is the effect of the magnetic field on this particle?

  1. It causes particle to disintegrate.
  2. It causes particle to accelerate.
  3. <font size="2">The particle remains stationary</font>.
  4. Both (1) and (2) can be possible.
  5. None of these
Question 14 Multiple Choice (Single Answer)

______________ precedes attraction in magnetism.

  1. Induction
  2. Conduction
  3. Heating
  4. Cooling
  5. None of these
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