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GCSE Physics notes: (c) Electrical energy & electrostatic electricity energy stores

TYPES OF ENERGY STORE - examples explained

(c) Electrical energy and electrostatic energy stores

Doc Brown's GCSE 9-1 Physics Revision Notes

Suitable for GCSE/IGCSE Physics/Science courses or their equivalent

What is electrical energy?

Can you store electrical energy?

Quote some sources of electrical energy

Electrical energy and electrostatic energy stores

• Electrical energy is usually the flow of electrical charge in the form of negative electrons.

• When an electrical current flows ('electricity'), the electrons carry the energy from a higher potential energy to a lower potential energy - measured as the potential difference in volts.

• A battery is a source of electrical energy but it is initially a store of chemical energy.

• You can of course convert electrical energy to another energy store e.g. charging a battery to increase its chemical potential energy store.

• Electrical energy can be converted into light with bulbs, thermal energy in heaters, or kinetic energy in electric motors.

• Electrical energy can be stored as static electricity where electrical charge cannot move until the 'charged' material is placed in contact with an electrical conductor.

• With electrostatic energy you are dealing with repulsion of like charges (+ <=> + and - <=> -) and the attraction of unlike charges (+ =><= -).

• Any attraction or repulsion movement of charged objects involves a force acting through a distance, so work is done and energy is transferred.

Magnetic or electromagnetic energy transfer

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Energy resources, and transfers, work done and electrical power supply revision notes index

Types of energy & stores - examples compared/explained, calculations of mechanical work done and power

Chemical  * Elastic potential energy  * Gravitational potential energy

Kinetic energy store  *  Nuclear energy store  *  Thermal energy stores  * Light energy  * Sound energy

Renewable energy (1) Wind power and solar power, advantages and disadvantages gcse physics revision notes

Greenhouse effect, global warming, climate change, carbon footprint from fossil fuel burning gcse physics

The Usefulness of Electricity gcse physics electricity revision notes

and The 'National Grid' power supply, mention of small scale supplies, transformers gcse physics notes

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