Principle
A coil is located in a DC circuit. When the circuit is closed, the magnetic field of the coil builds up and generates a self-induction voltage which counteracts the increase. An incandescent lamp in the circuit lights up only gradually.
Principle
A coil is located in a DC circuit. When the circuit is closed, the magnetic field of the coil builds up and generates a self-induction voltage which counteracts the increase. An incandescent lamp in the circuit lights up only gradually.