Electircity and magnetism Made by Carla Manso Delgado

Electricity � Electricity can be divided in: v Electrical charges v Electric current v Electric circuits v Circuit diagrams

What is electricity? � Everything around us is charged, including people. Electrical charges can be positive or negative. Objects usually have the same number so of positive and negative charges.

Electrical charges � Objects § § usually have the same number of positive and nagative charges. An object that loses negative charges becomes positively charged. An object that gains nagative charges becomes negatively charged. objects with same charge repel. objects with opposite charges attract.

Electric current � Electric § § current is the flow of electrical charges though materials. However , not all materials allow electrical charges to flow the same way. Insulators, such as glass, plastic and wood, don´t allow electrical charges. Conductors, such as most metals allow electrical charges.

Electric circuits � The § § eletric circuits are divided in : The generator. This provides the electricity Cables. These transport the electricity from one place of the circuit to another. The switch. Controls the flow of electricity by closing or opening. Devices. This transform the electricity into another form.

Circuit diagrams � Circuits diagrams help us to illustrate circuits. We use symbols to represent the different components. ( cable, switch, light bulb, battery)

Magnetism � Magnetism v Magnets. v Magnetic can be divided in : forces. v The earth`s magnetism.

What is magnetism? �A magnet is an object which attracts other objects made of iron and other magnetic metals. We call this attraction magnetism.

Magnets � Magnets can be natural or artificial. Some minerals, like magnetite, attract metallic objects. These are natural magnets. Almost all of the magnets we use artificial magnets.

Magnetic forces � Magnets § § have two areas, called poles. Are known as the north magnetic pole (N) and the south magnetic poles(S). When we place opposite poles of magnets near each other, they attract. When we place same poles of magnets near each other, they repel.

The Earth`s magnetism � The magnetic poles of the earth are opposite to geographic poles. North Magnetic Poles is found in the south near South Pole, the South Magnetic Pole is found in the north near the north pole.

Electromagnetism � Electromagnetic is divided in: v Electromagnets: that is divided in school bells v Uses of electromagnets.

What is electromagnetic? � Electricity and magnetism were once considered two separate phenomena. Then scientists observed that electric current can generate magnetism. This relationship between electricity and magnetism is called electromagnetism.

Electromagnets � Consist § o o of an iron core surrounded by a coil of wire. School bells: Many school bells use an electromagnet. When the switch closes, the electromagnet turns on. The electromagnets attracts an iron arm to the bell.

Uses of electromagnets � Electromagnets are much stronger than ordinary magnets. When we increses the electric current that flows though them, they become even stronger. This means electromagnets can be used in many different ways.

activities � What are the different components of circuits? � What ere the different poles? � What happened if we put to magnets of the same pole together? � Can be magnets artificial ? � Do you know how to do a circuit?

answers � The different components are cable, switch, light bulb and battery. � The different poles are south pole and north pole. � If we put to magnets of the same pole together is repelled. � Yes magnets can be artificial , like magnets we use in every day life. � Yes , we can do a electromagnet with a battery, a light bulb, cable and a switch. When we put all together we create a circuit.

videos � Magnetism Electricity

More videos � how electricity can create a magnet � what is electricity ? � electromagnet-What it is? � magnets and magnetism.

the end Manso By Carla