MAGNETISM- ASSIGNMENT
- Can a magnet have alone north pole? Can it have a south pole?
- Which material is used to make magnet?
- What is magnet?
- Why copper wire is not used for the fuse?
- How many poles are there in a magnet?
- State Fleming’s left hand rule. What are the factors on which the strength of magnetic field produced by a current carrying solenoid depends? Draw a simple diagram of solenoid and also explain its definition
- An iron needle is attracted to the ends of a bar magnet but not to the middle region of the magnet. Is the material making up the ends of a bar magnet is different from that of the material in the middle?
- How the intensity of magnetic field vary with the electric current?
- State right hand thumb rule?
- Differentiate between bar magnet and electromagnet?
- Name two materials used for electromagnet?
- Why soft iron is not used for making electromagnet?
- Explain Fleming left hand rule?
- How can you prove that the magnetic lines of forces are circular in nature?
- On what factors the magnitude of magnetic field produced by a straight current carrying wire depends?
- What do you mean by “magnetic effect of current”?
- What is role of magnetism in medicines?
- What are magnetic field lines? How is the direction of a magnetic field lines at a point determined? List any three properties of Magnetic lines of force.
- What is galvanometer?
- Draw a sketch to show the magnetic lines of force due to bar magnet?
- Why two magnetic lines of forces never intersect?
- What is electromagnetism?
- Draw a pattern of magnetic lines of forces due to circular coil?
- Abbreviate MRI?
- What is fuse? What is its function?
- How fuse saves our electrical devices?
- Explain with a neat diagram the principle and the working of electric motor?
- Explain with a neat diagram the principle and the working of electric generator? What is solenoid?
- What is live wire?
- What are the characteristics of a fuse wire?
- What is potential difference commonly in the electric supply in India?
- What is earth wire? What is its function?
- How can we avoid overloading in our homes?
- What is compass needle?
- What are AC and DC? What type of current we used in our homes?
- Why pure iron is not used in making permanent magnets. Name materials used for making permanent magnets.
- State Right hand thumb rule for finding the direction of magnetic field, around a current carrying straight conductor. How will the magnetic field be affected:-
- On increasing the current
- On changing the direction of flow of current.
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