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Fun with Magnets

All about magnetic and non magnetic material.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Magnet was discovered in magnesia when accidently a stick tip made of iron got attracted to a rock. This rock was named

  1. ironite
  2. magnetite
  3. bauxite
  4. cuprite
  5. None of these
Question 2 Multiple Choice (Single Answer)

The crane used for separating junk material has a big magnet block at its end. It is lowered and the junk made of D sticks to it. What is this D?

  1. Plastic
  2. Leather
  3. Iron
  4. Wood
  5. All of the above
Question 3 Multiple Choice (Single Answer)

What is common between a bar magnet, a horse-shoe magnet and a cylindrical or ball-ended magnet?

  1. All are made of iron.
  2. All are natural magnets.
  3. All are man-made magnets.
  4. Only (1) and (3)
  5. Both (1) and (2)
Question 4 Multiple Choice (Single Answer)

To which part of the magnet do iron fillings mostly get attracted?

  1. North pole
  2. South pole
  3. The edges of the magnet
  4. Both the poles
  5. The centre of the magnet
Question 5 Multiple Choice (Single Answer)

Which of the following materials will get attracted towards a magnet?

(a) Cobalt
(b) Aluminium
(c) Rubber
(d) Nickel
(e) Zinc
(f) Wood

  1. (a) and (b)
  2. (b) and (e)
  3. (a) and (d)
  4. (e) and (f)
  5. (d) and (f)
Question 6 Multiple Choice (Single Answer)

The South end of a magnetic needle points towards

  1. the geographical South
  2. the geographical north
  3. the geographical East
  4. the geographical West
  5. the centre of the earth
Question 7 Multiple Choice (Single Answer)

There are 50 magnet bars kept on the floor. How should the magnets be placed, so that just by pulling the first one, all others also move?

  1. They should be placed with their non polar edges touching.
  2. They should be placed in a circular form.
  3. They should be placed in a line with opposite poles touching.
  4. They should be placed in a line with like poles touching.
  5. They should be placed one above another with like poles on the same side.
Question 8 Multiple Choice (Single Answer)

The magnetic properties of a magnet cannot be harmed by

(a) heating it
(b) dropping it
(c) wetting it
(d) hammering it

  1. Only (a)
  2. Only (b)
  3. Only (c)
  4. Only (d)
  5. All of the above
Question 9 Multiple Choice (Single Answer)

Magnet was discovered by

  1. a shepherd named Magnes
  2. a scientist named William Gilbert
  3. a Danish physicist and chemist named Hans Christian Oersted
  4. a Scottish physicist named James Clerk Maxwell
  5. None of these
Question 10 Multiple Choice (Single Answer)

A magnet heated strongly is brought near an iron bar. Which of the following actions would be seen?

  1. The iron bar will be pushed back.
  2. The iron bar will be pulled near.
  3. The iron bar will be heated.
  4. The iron bar will show no movement.
  5. None of these
Question 11 Multiple Choice (Single Answer)

Raju carefully breaks a magnet into two pieces. The piece having North pole will have which of the following poles at the broken end?

  1. North pole
  2. No pole
  3. South pole
  4. Both South and North poles
  5. The magnet gets demagnetised.
Question 12 Multiple Choice (Single Answer)

Two bar magnets A and B are freely suspended from heights of 5 feet and 8 feet, respectively. After a few rotations, they both come to rest. Choose the alternative that depicts the correct directions of alignment of the two magnets.

  1. A: North-South
    B: East-West
  2. A: North-South
    B: North-South
  3. A: East-West
    B: East-West
  4. A: East-West
    B: North-South
  5. Depends on the speed of rotation
Question 13 Multiple Choice (Single Answer)

Ram is trying to make a magnet from an iron bar. What should be his course of action?

  1. Rubbing the iron bar onto the magnet in one direction
  2. Hitting the magnet on the iron bar
  3. Rubbing the magnet onto the iron bar in one direction
  4. Hitting the iron bar on the magnet
  5. Tying the iron bar and the magnet together
Question 14 Multiple Choice (Single Answer)

Two bars are identical in size and shape, out of which one is a magnet. Which of the following is the correct way to distinguish between the two?

  1. Magnetic bar is hollow and hence, light weight.
  2. Magnetic bar will be heavy.
  3. Magnetic bar will show a deflection when someone touches it.
  4. Magnetic bar will attract an iron nail when taken near it.
  5. Magnetic bar will repel a plastic nail when taken near it.
Question 15 Multiple Choice (Single Answer)

Ravi is standing with a magnetic compass in his hand. A bird flew towards the direction opposite to the direction in which the painted part of the needle points. In which of the following directions did the bird fly?

  1. Towards South
  2. Towards North-East
  3. Towards North
  4. Towards West
  5. Towards East
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