When a current flows in a wire, it creates a circular magnetic field around the wire. The magnetic field is strongest closer to the wire and can be made stronger if the current is increased. , A solenoid consists of a wire coiled up into a spiral shape. When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet., The small magnetic fields caused by the current in each coil of a solenoid add together to make a stronger overall magnetic field., A solenoid with an iron core is called an electromagnet. The iron core increases the solenoid’s magnetic field strength. , Electromagnets are used in devices such as electric bells, and door locks that can be controlled remotely.,

Electromagnets

הדפסה
הטבעה

לוח תוצאות מובילות

סגנון חזותי

אפשרויות

החלף תבנית

האם לשחזר את הנתונים שנשמרו באופן אוטומטי: ?