Electrical Bell Science Museum at Home electromaget mainan sains

This product uses the magnetism generated when the electromagnetic current passes through, attracts the shrapnel under the small hammer to hit the bell, and at the same time disconnects the circuit, the electromagnet loses its magnetism, the small hammer is bounced back, the circuit is closed, and the circuit is repeated, and it is issued There was a continuous beating. Understand the working principle and application of electromagnets through experiments.