A. Answer in Detail: 1. How will you make an electromagnet in the laboratory? Ans: An electromagnet can be made easily in the laboratory by following these steps: First we have to take a soft iron nail . Then we wind insulated copper wire tightly around the nail many times. Connect the two free ends of the wire to a battery . When the circuit is completed, electric current flows through the wire and the iron nail becomes magnetised. Result: The iron nail behaves like a magnet as long as current flows. When the current is switched off, it loses magnetism. 2. With the help of a diagram, show the working of an electric bell. Answer: Working of an Electric Bell: When the switch is pressed, electric current flows through the coil. The coil becomes an electromagnet and attracts the iron armature. The hammer attached to the armature strikes the gong and produces sound. This breaks the circuit, the electromagnet loses magnetism, and the armature returns to its original...
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