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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» 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


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