is electric fuse and application of heating effect of electric current
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.The kitkat fuse and the cartridge fuse are working on the principle of heating efffect of electric current as it consist of thin wire having high resistance and low melting point, due to high resistance when current passes it start heating and melts down which helps in saving the electrical appliances.
Ans 6. the activity to make an electromagnet -
1. Take some iron nails
2. Wind copper wire around the iron nail.
3. Now connect 2 ends of the copper wire with a battery .
4. Now bring some iron pieces near the iron nail .
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