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Summary *A-LEVEL PHYSICS REVISION FOR ALL EXAM BOARDS* Electricity

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2021/2022 Written for academic year
Institution OCR
Module AS Unit G482 - Electrons, Waves and Photons
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Topics: -Charge -Current -Voltage and e.m.f. -Resistance -Resistivity -Voltage/Current graphs -Circuit components -Series and parallel circuits Includes diagrams and equations.

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Module 4 – Electricity

, 03
01 02
Electric current Given by the Current is
is defined as equation: ΔQ = measured in
the rate of flow IΔt Amperes (A)
of charge. and Current is
measured in
Coulombs (C)




Electric Current:

, Electron flow

Conventional current flows from positive to
negative.

This differs from electron flow, which is from
negative to positive.

Electrons take a chaotic path and don’t usually
travel in a straight line.

If no p.d. is applied, then electrons will still
move, but there will be no net movement.

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Study Level
A/AS Level
Subject
Physics A
Uploaded on
January 7, 2023
Number of pages
20
Written in
2021/2022
Type
Summary
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