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