Class 12PhysicsElectric Charges and Fields

Electric Charge

Charge is a fundamental property of matter. Two types: positive (protons) and negative (electrons). Like charges repel, unlike attract. Charge is quantized: q = ne (n is integer, e = 1.6×10⁻¹⁹ C). Charge is conserved: total charge in isolated system is constant. SI unit: Coulomb (C). 1 C is very large — typical charges are μC or nC.

How to study this topic

Read the core explanation once without solving.
Open the formula links below and connect them with the topic meaning.
Practice the 10 example pages one by one.
Use the AI ask page for text, voice or image-based doubts.

10 example pages

Concept check 1

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Definition to application 2

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Formula warm-up 3

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Reasoning practice 4

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Board-style short answer 5

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Mistake correction 6

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Visual interpretation 7

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Applied word problem 8

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Revision challenge 9

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Exam recap 10

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