8 j magnets and electromagnets (whs)

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Information about 8 j magnets and electromagnets (whs)

Published on March 31, 2014

Author: PreetiGhosh2

Source: slideshare.net

Magnets and ElectromagnetsMagnets and Electromagnets

N S Magnetic fieldsMagnetic fields

Attracting and RepellingAttracting and Repelling

N S Magnet: Solenoid:

ElectromagnetsElectromagnets The strength of an electromagnet can be increased by: 1) Increasing the voltage 2) Increasing the number of coils 3) Inserting an iron core (The poles can be reversed if you reverse the direction of the current)

Examples of electromagnetsExamples of electromagnets 1. Speaker 2. Relay switch

An electric bellAn electric bell

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