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You may have heard of electric current. But what exactly is it? In this lesson, we will explore this and figure out how do we measure this?

- Finding electric currentGet 3 of 4 questions to level up!

Voltage is a very common word in electricity. But in this lesson, we will learn exactly what it means and how to calculate it.

- Voltage and workGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 200 Mastery points

We saw what current & voltage are. Now let's explore the connection between them, which is famously called 'Ohm's law'

What decides whether something is a good or a bad conductor of electricity? It's the resistivity of that material. So let's explore this concept of resistance and resistivity in detail.

- Resistance and resistivityGet 5 of 7 questions to level up!

How to solve circuits when we have more than 1 resistor in it? That's exactly what we will learn in this lesson.

- Finding equivalent resistanceGet 3 of 4 questions to level up!
- Identifying types of resistor combinationsGet 3 of 4 questions to level up!

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

Sometimes we are challenged with mixed circuits, containing resistors both in series and parallel. Let's learn how to tackle such problems once and for all

- Simplifying resistor networksGet 3 of 4 questions to level up!
- Finding currents and voltages (pure circuits)Get 3 of 4 questions to level up!
- Finding currents and voltages (mixed circuits)Get 3 of 4 questions to level up!

Level up on the above skills and collect up to 300 Mastery points

We love electricity. But the same electricity heats up your phone when you are gaming. So let's explore why electricity heats up things, and how we can use it to our advantage.

- Electric power (formula)Get 3 of 4 questions to level up!
- Calculating heat dissipated in circuitsGet 3 of 4 questions to level up!

Circuits with electric bulbs seem tricky at first. But once we get the knack, it will be a breeze. So let's learn how to attack such circuits.

- Bulbs connected in series or parallelGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 300 Mastery points

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.

- Finding cost of electrical operationGet 3 of 4 questions to level up!

This section starts with a video summarising the chapter, which is followed by an article covering CBSE board exam questions, arranged by subtopic.

Up next for you:#### Unit test

Level up on all the skills in this unit and collect up to 1300 Mastery points!