Reshma bought three identical metal bars from the market. Class 6

Reshma bought three identical metal bars from the market. Class 6

Question 1.

Reshma bought three identical metal bars from the market. Out of these bars, two were magnets and one was just a piece of iron. How will she identify which two amongst the three could be magnets (without using any other material) ? Class 6

Answer:

Reshma can identify by the activity of magnetic attraction.

1. Take one of the bars and bring it close to each of the other two bars, one at a time.
2. If the first bar is a magnet, it will attract the second bar (which could also be a magnet) or repel it depending on the orientation of the poles.
3. If the first bar is not a magnet (it’s the piece of iron) it will not attract or repel the second bar.

It shows that iron is not a magnetic material.

Question 2.

You are given a magnet which does not have the poles marked. How can you find its poles with the help of another magnet which has its poles marked ? Class 6

Answer:

When we bring marked magnet (A) towards the unmarked magnet (B), these conclusions can be drawn :

1. If the North pole of (A) bring towards (B) and magnets repel each other, then it would be North pole of that magnet and other would be South pole.
2. If the South pole of (A) bring towards (B) and magnets attract each other, then it would be North pole of that magnet and other would be South pole.