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Summary Grade 12 IEB Physical Science: Electric Circuits

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These notes cover Section E as per the IEB Physical Sciences SAGS. Included are comprehensive notes on Ohm’s Law, Power & Energy and Internal Resistance & Series & Parallel Networks. To perform well in physics, practicing textbook examples as well as past papers is imperative to make sure you understand the work.

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ELECTRIC CIRCUITS




@STUDYNOTESBYM

, E. ELECTRIC CIRCUITS

1. OHM’S LAW

POTENTIAL DIFFERENCE

The work done per unit positive charge


𝑾
𝑽=
𝑸
V: potential difference (V)
W: work done/ change in energy (J)
Q: charge (C)
0

CURRENT

The rate of flow of charge


𝒒
𝑰=
0𝒕
I: current (A)
q: charge (Q)
t: time (s)
0

OHM’S LAW

Ohm’s Law: current through a conductor is directly proportional to the potential
difference across the conductor at constant temperature


𝑉 = 𝐼𝑅
0


• Ohm’s law explains the relationship between current and potential difference:
current and potential difference are directly proportional at a constant temperature
Connected book
image
Marion Mann Physical Sciences
Publisher: 2018 ISBN: 9781776114726 Edition: Unknown

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Electric circuits
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