Ncert- CLASS 6 – SCIENCE- Chapter 10: Fun with Magnets Welcome to your Ncert- CLASS 6 - SCIENCE- Chapter 10: Fun with Magnets 1. Find the odd one out :Magnetite, Magnes, Magnesia, Bar magnet 2. All magnetic materials lose their magnetic properties when : Brought near a piece of iron Dipped in oil Strongly heated Dipped in water None 3. A permanent magnet Attracts magnetic substances and repels all others Attracts some substances and repels others Attracts all substances Attracts only ferromagnetic substances None 4. Which of the following will NOT be attracted by a magnet? Iron Gold Cobalt Nickel None 5. When the N-pole of a magnet is placed near the S-pole of another magnet then it the south pole. 6. What does a student need to do to find out whether a material is a magnet? Find out if the material can be repelled by a compass. Find out if the material can be attracted to a steel plate. Find out if the material is a metal or a non-metal. Find out if the material is a conductor or a non-conductor. None 7. Which of the following is used to make permanent magnets ? Nichrome Copper Soft iron Steel None 8. The magnet can be completely demagnized by A reverse field of appropriate strength Breaking the magnet into small pieces Heating it slightly Dropping it into ice cold water None 9. The special property of magnetic substance is they cannot be made into magnets they are both attracted and repelled by magnets they are repelled by magnets they are attracted towards magnets None 10. Where is the attractive property of a magnet is maximum ? north and south poles both south pole only mid point of the magnet. north pole only None 11. When the north pole of a strong magnet is brought near to the north pole of a weak magnet then they will Attract each other First attract and then repel Repel each other First repel and then attract None 12. The magnetic field is strongest near the : Ends of the magnet Poles of the magnet Centre of the magnet One quarter point from the poles of the magnet None 13. Two bars of soft iron exactly alike are given. One of them is a magnet. Without using anything more, how would you find which is a magnet - By rubbing one bar with the other and noting which becomes a magnet. The bar which is magnetized is an ordinary iron. By bringing two bars near and noting which one is repelling. One which repels is an ordinary iron. By bringing two bars near and noting which one is attractive. The attracting one is a magnet One bar is placed flat horizontally on the table and the other bar is held vertical with its one end on the middle of the first bar. If there is the attraction between the two, the vertical bar is magnet otherwise ordinary iron. None 14. Which of the following is not a magnetic substance? Nickel Cobalt Iron Brass None 15. All magnetic materials lose their magnetic properties when: Dipped in water Dipped in oil Strongly heated Brought near a piece of iron None 16. Assertion: Steel is attracted by a magnet Reason: Steel is not a magnetic substance Both A and R are true and R is not correct explanation of A. A is false, but R is true A is true, but R is false Both A and R are true and R is the correct explanation of A. None 17. Magnetite contains which metal ? 18. A magnet can be easily turned into a ______ by excessive heating. Fill in the blank. Permanent Magnet Temporary Magnet Electromagnet None None 19. Few common pins are placed on a table with a glass top. A powerful bar magnet is moved under the glass top. Describe the movement of common pins. be thrown up in air. not move move opposite to the direction of magnet move in the direction of magnet None 20. The force of attraction of a magnet is maximum at : its sides its corners its poles the midpoint None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
