1. Increase the current: The strength of an electromagnet is directly proportional to the current flowing through the coil. More current means a stronger magnetic field. This can be achieved by using a larger power source or by reducing the resistance in the circuit (e.g., using thicker wire).
2. Increase the number of turns in the coil: The magnetic field strength is also proportional to the number of turns in the coil. More turns mean more loops of wire, which in turn creates a stronger magnetic field. This is why electromagnets often have coils with many turns.
