Question

As at my home the electricity comes from thermal power plant. Which is generates with the help of AC generator. Am I true? As I learnt that in AC generator the direction of current changes. So why don't when I use a current tester device it's LED blinks. And only light up in one word of socket not in another?
please answer me fast.
Please

Answer 1

Thermal Power Plants, Wind farms, Hydro Power plants and Nuclear Power plants, all produce AC power because the generator is a rotating component in all of these.

Since AC is easier to step up and step down (using transformers, which work only on AC), it has been widely adopted. This led to the usage of AC for commercial as well as domestic electrical appliances.

However, if the electrical component has low rating, or works on batteries, then DC is used. Generally, nowadays, DC is used for components that require in the order of 10 V or less. Also only DC can be stored.