OCR AS Physics Electricity, Waves & Quantum definitions

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  • Created by: Mal
  • Created on: 19-03-14 13:33

Pages in this set

Page 1

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Introduction
There are 31 Unit 2
definitions which you
need to learn and
practice recalling.
These are all listed in
these slides.

Other SmartphonePhysics
resources give you more
background detail on each.

Page 2

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The Coulomb
1 Coulomb is the
charge transferred
when a CONSTANT
current of 1 Amp flows
for 1 second.

Symbol: Q
Unit: C

Page 3

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Drift Velocity
The average velocity of
charged particles
through a material due
to the applied potential
difference.

Symbol: v
Unit: ms-1

Page 4

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Potential
Difference

The energy transferred
from electrical to non-
electrical form per unit
charge.

Symbol: V
Unit: V

Page 5

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The Volt
1 Volt is 1 Joule per
Coulomb.

Page 6

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Electromotive
Force

Electromotive force
(e.m.f) is the energy
transferred from non-
electrical to electrical
form per unit charge.


Symbol:
Unit: V

Page 7

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Resistance
The potential difference
per unit current for a
component.

Symbols: R, r
Unit:

Page 8

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The Ohm
1 Ohm is 1 Volt per
Amp.

Page 9

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Ohm's Law
The current flowing
through a component is
proportional to the
potential difference
applied across it
providing that other
physical properties, like
temperature and length
remain constant.

Page 10

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Resistivity
The resistance of a
material multiplied by
its cross-sectional area
per unit length.


Symbol:
Unit: m

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