ZUBAIR AHMEDZUBAIR AHMED

AGENDA AGENDA

Electricity

Energy Sources

Static Electricity

Electric charge moves

Magnets and Electricity

Battery produces electricity

Electricity travels in a circuit

Electricity is generated

Methods of electricity generated

It is basically the flow of electrical power or charge.

It is a basic part of our nature and one of our most widely used forms of energy.

Energy Sources Energy Sources

Primary Source: Many cities and towns were built alongside waterfalls that turned water wheels to perform work.

Coal, natural gas, oil, nuclear power and other natural sources are another examples of primary sources.

Secondary source: Electricity is the conversion of primary sources of energy.

STATIC ELECTRICITYSTATIC ELECTRICITY

Static electricity refers to the accumulation of excess electric charge in a region with poor electrical conductivity (an insulator), such that the charge accumulation persists.

EXAMPLEEXAMPLE Have you ever made

your hair stand straight up by rubbing a balloon on it? If so, you rubbed some electrons off the balloon. The electrons moved into your hair from the balloon. They tried to get far away from each other by moving to the ends of your hair.

How electric charge moves?How electric charge moves? The electrons in the

outermost shells do not have a strong force of attraction to the protons.

These electrons can be pushed out of their orbit applying a force can make them move from one atom to another.

These moving electrons are electricity.

Magnets and ElectricityMagnets and Electricity

The spinning of the electrons around the nucleus of an atom creates a tiny magnetic field.

Most objects are not magnetic because the atoms are arranged so that the electrons spin in different, random, cancel out each other.

Cont..Cont..

Magnets are different: the molecules in magnets are arranged so that the electrons spin in the same direction.

This arrangements of atoms creates two poles in a magnet, North-seeking pole and a South-seeking pole.

Cont..Cont.. The magnetic force in a

magnet flows from the North pole to the South pole.

Same sided poles repel each other.

How battery produces electricity?How battery produces electricity?

A battery produces electricity using two different metals in a chemical reaction.

This chemical reaction frees more electrons in one metal than in the other.

How battery produces electricity?How battery produces electricity?

The one end frees more electrons having +ve charge and the other end having –ve charge to flow electrons through the wire to balance the electrical charge.

How electricity travels in a circuit?How electricity travels in a circuit?

Electricity travels in closed loops, or circuits (from the word circle).

It must have a complete path before the electrons can move.

If a circuit is open the electrons cannot flow. When we flip on a light switch, we close a circuit.

How electricity is generated?How electricity is generated?

A generator is a device that converts mechanical energy into mechanical energy.

A typical generator at a power plant uses an electromagnetic.

The generator has a series of insulated coils of wire that form a stationary cylinder.

Cont..Cont..

This cylinder surrounds a rotary electromagnetic shaft.

When the electromagnetic shaft rotates, it induces a small electric current in each current in each section of the wire coil.

Methods of electricity generatedMethods of electricity generated

Natural gas Petroleum Nuclear power Hydropower Geothermal power Solar power Wind power Biomass

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