Ncert- CLASS 6 – SCIENCE- Chapter 10: Fun with Magnets Welcome to your Ncert- CLASS 6 - SCIENCE- Chapter 10: Fun with Magnets 1. Which of the following is not a magnetic substance? Brass Iron Nickel Cobalt None 2. Which of the following is used to make permanent magnets ? Nichrome Copper Steel Soft iron None 3. All magnetic materials lose their magnetic properties when: Brought near a piece of iron Dipped in water Strongly heated Dipped in oil None 4. The magnet can be completely demagnized by Heating it slightly A reverse field of appropriate strength Breaking the magnet into small pieces Dropping it into ice cold water None 5. When the north pole of a strong magnet is brought near to the north pole of a weak magnet then they will First repel and then attract First attract and then repel Repel each other Attract each other None 6. When the N-pole of a magnet is placed near the S-pole of another magnet then it the south pole. 7. Where is the attractive property of a magnet is maximum ? north and south poles both south pole only north pole only mid point of the magnet. None 8. Magnetite contains which metal ? 9. 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. Both A and R are true and R is the correct explanation of A. A is true, but R is false A is false, but R is true None 10. The magnetic field is strongest near the : Poles of the magnet Centre of the magnet One quarter point from the poles of the magnet Ends of the magnet None 11. What does a student need to do to find out whether a material is a magnet? Find out if the material is a conductor or a non-conductor. Find out if the material is a metal or a non-metal. Find out if the material can be attracted to a steel plate. Find out if the material can be repelled by a compass. None 12. A permanent magnet Attracts only ferromagnetic substances Attracts all substances Attracts some substances and repels others Attracts magnetic substances and repels all others None 13. All magnetic materials lose their magnetic properties when : Strongly heated Brought near a piece of iron Dipped in oil Dipped in water None 14. Find the odd one out :Magnetite, Magnes, Magnesia, Bar magnet 15. Which of the following will NOT be attracted by a magnet? Nickel Cobalt Gold Iron None 16. 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 17. 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. move in the direction of magnet not move move opposite to the direction of magnet None 18. The force of attraction of a magnet is maximum at : its corners the midpoint its sides its poles None 19. 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 bringing two bars near and noting which one is repelling. One which repels is an ordinary iron. 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 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 20. A magnet can be easily turned into a ______ by excessive heating. Fill in the blank. Temporary Magnet Permanent Magnet None Electromagnet 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.
