Fun with Magnets - Questions

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: Monday, 12 November 2018, 1:24 PM