Answer the following:
1. Write any two properties of a magnet.
2. You are given an iron strip. How will you make it into a magnet?
3. How is a compass used to find directions?
4. Write two methods by which a magnet can be demagnetised.
5. 5.It is said that repulsion is a sure test for magnetism. Why is it so?
Task 1.
1.A bar magnet has no markings to indicate its poles. How would you find out near which end is its north pole
located?
2.Few iron nails and screws got mixed with the wooden shavings while a carpenter was working with them. How
can you help him in getting the nails and screws back from the scrap without wasting his time in searching with his
hands?
Answers
Answer:
How is a compass used to find directions?
4. Write two methods by which a magnet can be demagnetised.
5. 5.It is said that repulsion is a sure test for magnetism. Why is it so?
Task 1.
1.A bar magnet has no markings to indicate its poles. How would you find out near which end is its north pole
located?
2.Few iron nails and screws got mixed with the
Answer:
1 - Two properties of a magnet are: (i) A magnet always has two poles: a north pole and south pole. (ii) Like magnetic poles repel each other and unlike magnetic poles attract each other.
2 - An iron strip can be converted into a magnet by the following method: Place the iron strip on a table. Place one pole of a bar magnet near one end of the iron strip. Move the bar magnet along the length of the iron strip starting from one end to the other end
3 - A compass has a magnetic needle that can rotate freely. When a compass is kept at a place, the magnetic needle aligns in a north-south direction. ... The red arrow of the compass is termed as the North Pole and the other end is called as is termed as the South Pole and this helps Compass to fire us to find the directions.
4 - A magnet can be demagnetized in the following ways
hammering the magnet several times. passing an alternating current around the magnet. dropping the magnet on the floor several times. heating the magnet to a very high temperature.
5 - Repulsion is the sure test for magnetism because it occurs only when two like poles of a magnet exist while the attraction phenomenon can occur between two unlike poles of a magnet and also between a magnet and a magnetic material means if there are two magnets they will attract each other and suppose if one material ...
Task 1 first - A bar magnet has no markings to indicate its poles. How can you find out the location of the north pole? Solution: The location of the poles as the magnet can be determined by suspending it freely.
task 2 - With the help of a magnet we can attract all iron nails and screws and can separate them from the wooden shavings. As iron nails and screws are magnetic materials and will get attracted to the magnet, whereas wooden shavings are non-magnetic.