An electric current flowing through a conductor creates a magnetic field around it. This principle is used in electromagnets, electric motors, and gen
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How does an electric bell work?
Current flows through an electromagnet coil, creating a magnetic field that attracts an iron hammer. The hammer strikes the bell and the vibration breaks the circuit, stopping current. Without current, the electromagnet loses its field and the hammer returns, completing the circuit again. This repeating cycle produces the ringing sound.
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Why do we need a split-ring commutator in a motor?
The split-ring commutator reverses the current direction in the coil every half rotation. This ensures the force on both sides of the coil remain in opposite directions, maintaining continuous rotation. Without it, the coil would oscillate back and forth instead of rotating continuously.
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What is the difference between a motor and a generator?
A motor converts electrical energy to mechanical energy by using a current-carrying coil in a magnetic field. A generator converts mechanical energy to electrical energy by rotating a coil in a magnetic field. They use the same principle but in opposite directions.
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