Electricity and magnetism by carmen Ramos
Transcript of Electricity and magnetism by carmen Ramos
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UNIT-7ELECTRICITY AND MAGNETISM
By Carmen Ramos
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·What are the materials called when theyattract objects made of steel or iron?
They are calledmetals
They are calledminerals
They are calledmagnetic
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STATIC ELECTRICITY
Static electricity occurs when you rub objects together.Objects can be:·Neutral: This is when an object has a differentnumber of positive and negative charges·Electrically charged: This is when an object has a different number of positive charges and negative charges
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OBJECT BEHAVIOUR TOWARDS ELECTRICITYDepending on their electrical charges, different things occur when two objectswith electrical charge are near each other: ·Objects with different electricalcharges attract each other.Like when you comb your hair.·Objects with the same electrical chargesrepel each other. Like when you rub twoinflated ballons with a piece of wool.
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CONDUCTING AND INSULATING MATERIALS ·Conducting materials: Electrical charges can movethrough them easily.
·Insulating materials: Electrical charges cannot movethrough them.
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ELECTRIC CIRCUITSElectric current is the movementof electrical charges through a conducting material.The mainparts of an electric circuit are:
·Current generator.·Conducting elements or wires.·Devices or receivers:
·Switch.·Electricity meter.·Protection devices or circuit breakers.
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USES OF ELECTRIC CURRENTElectric current has many uses:·Light, images and sound.·Heat.·Movement.·Communication.
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MAGNETSMagnets can attract certain metals. They can be:·Natural: like magnetite·Artificial.
All materials have two parts , their north poles (N) and their south poles (S).
CHARACTERISTICS OF MAGNETS·You can never separate the poles of a magnet·When we put two magnets together,two things can happen:
-They repel.-They attract.
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THE MAGNETIC POLES OF THE EARTHOur planet has a north magnetic pole and a south magneticpole. We use a compass to show us where the Earth’s northmagnetic pole is.
USES OF MAGNETISMMagnetism has different uses:·Orientation.·Magnets.·Information storage.·Theft control.·Identification.
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THE END By Carmen Ramos
6ºB