Third Research Project -

Physic and chemistry

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INDEX

1.

What is electric current?

2.

What does the Ohm´s law say?

3.

What is electrical energy?

4.

How electrical energy can be generated?

5.

Transportation and distribution of electricity.

6.

Rational and efficient use of energy.

What is electric current?

Electric current is the flow of electric charge, typically measured in amperes (A), through a conductor.

What does the Ohm´s law say?

Ohm's Law states that the current through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance.

The formula is I=V/R

What is electrical energy?

Electrical energy is the energy that is caused by the movement of electric charges, typically electrons, through a conductor. It is measured in joules (J) or kilowatt-hours (kWh) and is commonly used to power electrical devices and systems.

How electrical energy can be generated?

1. Thermal Power Plants: Burning fossil fuels like coal, natural gas, or oil to produce steam that drives turbines connected to generators.

2. Nuclear Power Plants: Using nuclear reactions to produce heat, which generates steam to drive turbines and generators.

3. Hydroelectric Power: Harnessing the energy of falling or flowing water to turn turbines connected to generators.

4. Wind Power: Using wind turbines to convert the kinetic energy of wind into electrical energy.

5. Solar Power: Converting sunlight directly into electricity using photovoltaic cells or using solar thermal energy to produce steam that drives turbines.

6. Geothermal Power: Using heat from the Earth's interior to produce steam that drives turbines connected to generators.

7. Biomass Power: Burning organic materials to produce steam that drives turbines connected to generators.

8. Tidal and Wave Power: Harnessing the energy from ocean tides and waves to drive turbines connected to generators.

Transportation and distribution of electricity.

1. Transportation: High-voltage lines carry electricity over long distances from power plants to substations. 2. Distribution: Substations reduce the voltage, and lower-voltage lines deliver electricity to homes and businesses.

Rational and efficient use of energy.

Rational and efficient energy use means using energy wisely by conserving it, adopting efficient technologies, changing behaviors, and implementing supportive policies.

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