PHYSICS - Electricity - Power Stations and National Grid

The video discusses the generation and transmission of electricity, highlighting the fact that over 1 billion people lack access to it. It covers various methods of electricity generation, including renewable and non-renewable sources, with a focus on fossil fuel power stations. The process of electricity transmission through the national grid is explained, emphasizing the role of transformers in reducing energy loss. The video aims to provide a comprehensive understanding of how electricity reaches our homes.

Which of the following is NOT a renewable source of energy?

• Wind turbines

• Biomass

• Solar panels

• Nuclear

What is the primary fuel used in most power stations to generate electricity?

• Oil

• Biomass

• Coal

• Natural gas

In a fossil fuel power station, what is the steam used for?

• Turning a turbine

• Heating water

• Reducing emissions

• Cooling the generator

What is the purpose of a step-up transformer in the national grid?

• To increase voltage and decrease current

• To convert AC to DC

• To decrease voltage and increase current

• To store electricity

Why is it important to reduce the current in electricity transmission?

• To reduce energy loss as heat

• To improve the quality of electricity

• To increase the speed of electricity

• To make electricity safer