Question

1. How will you make an electromagnet in the laboratory? 2. With the help of a diagram, show the working of an electric bell. 3. What is electric resistance? How is it used in an electric bulb? 4. What are conductors? How are they useful in an electric circuit? Answer Briefly please






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Answer 1

Answer:

At first rub off the dirt or rust on the surface of the iron nail. Then wrap around the copper wire on the iron nail for 75-100 rounds. Connect the both ends of the wrapped copper wire with the positive and negative terminals of the battery. Then the iron nail will become an electromagnet.