Q1. Fill in the blanks.

                           i.        An object that attracts materials like iron, nickel and cobalt is called a____________.

                          ii.        A magnet has two poles –________Pole and ________Pole.

                         iii.        Magnetite is a ______________magnet.

                         iv.        A ____________can be used to find directions.

                         v.        _________________magnets retain their properties only for a short period of time.


Q2. True/False

                           i.        A cylindrical magnet has only one pole. _______

                          ii.        The force of attraction of magnet is maximum at the poles and minimum at the centre. _________

                         iii.        Plastic is a magnetic material. ________

                         iv.        The earth behaves like a giant magnet. ________

                          v.        We can make magnet with single pole. _______


Q3. Who discovered magnets?


Q4. Where are poles of a bar magnet located?


Q5. Where on a magnet is the magnetic force the maximum?


Q6. How a mixture of iron fillings and sand is separated?


Q7. Where on a magnet is the magnetic force the minimum?


Q8. In which direction a freely suspended magnet come to rest?


Q9. What happen when we bring magnetic compass near a closed electric circuit?


Q10. Name the two poles of a magnet.


Q11. If magnet is not attracting the iron nails. What could be the reason behind this?


Q12. What happens when a south pole of a magnet is brought near the south pole of another magnet?


Q13. How can a magnet be demagnetized?


Q14. How can you tell whether a particular substance is magnetic or non-magnetic?


Q15. Why should we not keep magnets near mobiles, television, computers and CD?


Q16. Why a magnet is called a "magnetic dipole”?


Q17. What are electromagnets?


Q18. If a bar magnet broke into pieces, then where will its North and South Pole?


Q19. How do magnets lose their properties?

Last modified: Thursday, 3 January 2019, 9:34 PM