1 / 8

MAGNETISM

MAGNETISM. Introduction. A magnetic field is a region in space where magnetic forces can be detected. It can be shown using magnetic field lines . The direction of the field (shown by an arrow) is the direction a small north pole would move if placed in the field.

selina
Download Presentation

MAGNETISM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MAGNETISM

  2. Introduction • A magnetic field is a region in space where magnetic forces can be detected. • It can be shown using magnetic field lines. • The direction of the field (shown by an arrow) is the direction a small north pole would move if placed in the field. • Strengthof the magnetic field is shown by the density of the fieldlines.

  3. Like poles repel, opposite poles attract • The north pole (arrowhead) of a compass needle points towards the magnetic south pole of the Earth. This is located near the Earth’s geographic north pole.

  4. Magnet observations • New Directions PowerPoint

  5. Magnetic field around a current-currying wire • The Right Hand Grip rule is usedto determine the direction of the magnetic field around a current carrying wire. • Grasp the wire with right hand so that thumb points in the direction of the current. • Your fingers curl in the direction of the magnetic field.

  6. The magnetic field around a solenoid • The Right Hand Solenoid rule is used to find the direction of the magnetic field around a solenoid (coil of wire). • Grasp the solenoid with your right hand so your fingers curl in the direction of the current. Your thumb will point towards the magnetic north pole.

  7. Electromagnets • Consists of a coil of wire wound around a soft iron core. The strength of the electromagnet can be increased by: • Increasing the number of turns of wire per metre • Increasing the thickness of the soft iron core • Increasing the current in the coil

More Related