NCERT Class VI Science Solutions: Chapter 13 – Fun with Magnets Part 3

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SHORT ANSWER QUESTIONS

Question 10:

Four identical iron bars were dipped in a heap of iron filings one by one. Fig, shows the amount of iron filings sticking to each of them.

Result for iron filings

Iron Filings

Result for iron filings

  1. Which of the iron bar is likely to be the strongest magnet?

  2. Which of the iron bars is not a magnet? Justify your answer.

Answer:

  1. A seems to be the strongest magnet because the maximum amount of iron filing are sticking to it, maximum iron filing have been attracted by it.

  2. B because there are no iron filings sticking to it.

Question 11:

A toy car has a bar magnet laid hidden inside its body along its length. Using another magnet how will you find out which pole of the magnet is facing the front of the car?

Answer:

If the front of the toy car gets attracted to the north pole of the given magnet then it is the south pole of the bar magnet hidden inside the car.

Question 12:

Match Column I with Column II (One option of A can match with more than one option of B)

Match the Items of Column I and Column II
Match the items of Column I and Column II

Column I

Column II

Magnet attracts

Rests along a particular direction

Magnet can be repelled

Iron

Magnet if suspended freely

By another magnet

Poles of the magnet can be identified by

Iron filings

Answer:

  1. ii, iii and iv

    A magnet can attract magnetic materials like iron, iron filings and another magnet.

  2. iii

    If the north pole of a magnet is brought near the north pole of another magnet, then they both repel each other. Similarly, S – S poles of two magnets repel each other.

  3. i

    A magnet always stops in a particular direction (N - S), if suspended freely from a thread from its center.

  4. iii

    Poles of a magnet can be identified only if we have another magnet having its poles marked as North Pole and South Pole because only then we can see the attraction and repulsion between N – S poles and N – N poles, respectively.

Question 13:

You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.

Answer:

  1. By suspending the metal bars.

  2. By attracting iron filings.

  3. Using another magnet.

Image of Magnetic field lines

Image of Magnetic Field Lines

Image of Magnetic field lines