We pay for electrical energy. But when you look at an electricity bill, you don't see the familiar unit Joules. You only see 'unit'. What is this 'unit'? And why do electric companies measure electricity in terms of these 'units'? The answers, in this lesson.
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About this unit
We can't imagine our lives without electricity. But what exactly is electricity? How does electricity light up our houses? What does a battery do? What is the cost of electricity?
We will answer all these questions in this chapter.