EFFECTS OF AN EFFECTS OF AN ELECTRIC CURRENTELECTRIC CURRENT

WHAT ARE THESE EFFECTS?WHAT ARE THESE EFFECTS?

Heat effect Heat effect

Light effectLight effect

Magnetic effectMagnetic effect

Chemical effectChemical effect

HEAT AND LIGHT EFFECTHEAT AND LIGHT EFFECT

When an electric When an electric current flows current flows through the through the filament of a light filament of a light bulb, bulb, electric electric energy energy is is converted into converted into light light andand heat heat energyenergy..

We want the light We want the light from a light bulb, but from a light bulb, but a lot of the available a lot of the available energy is given off energy is given off as heat by an as heat by an incandescent light incandescent light bulb..bulb..

Energy-saving light Energy-saving light bulbs are much more bulbs are much more efficient in converting efficient in converting energy into light.energy into light.

Energy-efficient fluorescent light bulb converts more than 80% energy into light

WHERE ELSE DO WE USE WHERE ELSE DO WE USE THE HEAT EFFECT?THE HEAT EFFECT?

A fuse is a safety A fuse is a safety measure to prevent a measure to prevent a circuit from overheating.circuit from overheating.

The wire in a fuse is The wire in a fuse is made of a metal with a made of a metal with a lower melting point than lower melting point than that of the circuit that of the circuit conductors.conductors.

The fuse wire will burn The fuse wire will burn through when the circuit through when the circuit overheats, breaking the overheats, breaking the circuit.circuit.

Blade fuses are Blade fuses are used in motor car used in motor car engines.engines.

The element of a The element of a kettle converts kettle converts electric energy into electric energy into heat energyheat energy

MODERN CIRCUIT MODERN CIRCUIT BREAKERSBREAKERS

In modern circuit In modern circuit breakers the breakers the „fuses” are much „fuses” are much more more sophisticated.sophisticated.

Electrical boards in Electrical boards in our homes have our homes have „trip” switches.„trip” switches.

In some countries the use of a In some countries the use of a fuse in a plug is compulsoryfuse in a plug is compulsory

MAGNETIC EFFECT OF AN MAGNETIC EFFECT OF AN ELECTRIC CURRENTELECTRIC CURRENT

Magnetic effectMagnetic effect

Charge moving Charge moving through a conductor through a conductor causes a magnetic causes a magnetic effect around the effect around the conductor.conductor.

(Likewise, a magnet (Likewise, a magnet can cause an electric can cause an electric current in a conductor.)current in a conductor.)

http://www.youtube.com/watch?http://www.youtube.com/watch?feature=player_detailpage&v=Kumfeature=player_detailpage&v=KumDUr33qmIDUr33qmI

How to make an electromagnetHow to make an electromagnet Wind copper wire Wind copper wire

around an iron nail.around an iron nail. Connect the ends of Connect the ends of

the copper wire to a the copper wire to a battery; switch on.battery; switch on.

The The right hand rule right hand rule will help you to will help you to determine the determine the polaritypolarity of your of your electromagnet.electromagnet.

The right hand rule...The right hand rule...

Your fingers point Your fingers point in direction of in direction of conventional conventional current (+ to -).current (+ to -).

Thumb will point Thumb will point towards North.towards North.

You have to use You have to use RIGHT hand!RIGHT hand!

Applications of electromagnetismApplications of electromagnetism

Sound equipment Sound equipment e.g. Speakers and e.g. Speakers and microphones.microphones.

Electromagnetic Electromagnetic cranes.cranes.

Maglev trainsMaglev trainsEtc. Etc.

The train tracks as well as underside of train are magnetised; electromagnet activated and deactivated as train moves forward

https://www.youtube.com/watch?feature=player_detailpage&v=aIwbrZ4knpg

CHEMICAL EFFECT OF AN CHEMICAL EFFECT OF AN ELECTRIC CURRENTELECTRIC CURRENT

Breaking up of a compound by means of Breaking up of a compound by means of an electric current = an electric current = ELECTROLYSISELECTROLYSIS..

Solution that can conduct an electric Solution that can conduct an electric current = current = ELECTROLYTEELECTROLYTE..

https://www.youtube.com/watch?https://www.youtube.com/watch?feature=player_detailpage&v=Q62UfP-feature=player_detailpage&v=Q62UfP-ZADYZADY