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# Unit 2: How a microwave oven works?

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How do microwave ovens work? To explore this, we need to put together a few pieces, what electric dipoles are, how they behave in the presence of electric fields. But, let's get our basics right. In this lesson, we discuss the flow of the unit!

Where does everything electric start? Electric charge! Let's see what they are, and what rules they obey!

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### Practice

- Quantization of charge in experimental dataGet 3 of 4 questions to level up!
- Applying conservation of chargeGet 3 of 4 questions to level up!

A balloon rubbed with hair, sticks to walls. Why? Learning about charge transfer through friction and induction can help us answer this question!

### Practice

- Charge transfer processesGet 3 of 4 questions to level up!

Although a ball is pulled down by the mighty force of the entire Earth, I can easily counter it with my fingers. Why? How? Mindblown? Let's learn how to calculate electric force & compare it with gravity!

### Practice

- Relationship between electric force, charge, and distanceGet 3 of 4 questions to level up!
- Comparing electric force and gravitational forceGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

Let's dig a little deeper now, how do charges attract each other from a distance. How do they know what's going on?

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### Practice

- Electric field due to a point chargeGet 5 of 7 questions to level up!
- Force on charged particle in electric fieldGet 3 of 4 questions to level up!

In this final lesson, we see how the electric fields in the microwave oven heat up food! It turns out we need to understand the concept of electric dipoles to fully grasp the picture, so we start with dipoles!

### Learn

### Practice

- Dipoles in external electric fieldsGet 3 of 4 questions to level up!
- Dipoles in external electric fields: torqueGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

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Level up on all the skills in this unit and collect up to 900 Mastery points!