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This document contains detailed notes for the full course of the 9702 A2 Physics by CIE. It contains the most important notes from the cambridge physics textbook, examples from past papers (notes are constructed from past CIE questions to best suit their answers' wording, you can basically just memorise the notes and answer the exam questions exactly to the wording of the notes and it would be very similar to past exam mark schemes). This syllabus is valid from 2022 onwards until changed by CIE.
Typology: Study notes
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displacement, but they act in opposite directions
Damping - the loss of energy and decrease of amplitude of oscillations due to
resistive forces
Resonance - the maximum amplitude of vibrations when forced frequency equals
natural frequency
Forced frequency - frequency at which an object is made to oscillate at
Natural frequency - frequency at which the object is allowed to oscillate freely
Gravitational
fields
Newton's
gravitational
constant
of
gravitation
F
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object
mass
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Why the path of the moon’s orbit is circular:
How gravitational f and normal f gives rise to centripetal a (of an object that
rests on the earth’s surface - spins with the earth):
already
so
cannot
make
conclusions
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distance
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infree
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to point
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Eo
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Law
Electric
Potential
elect
Electric
Potential
Energy
of
Ep
49,
Feiffer
aoints
OW
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potential
The direction of the electric field lines
indicates the direction of force on a
positive charge
Potential
gradient
E
repulsive
force attractive
force
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potential
diagram
of
R
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there
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in
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When a smaller particle is attracted to a sphere:
as time increases
Features to describe on this type of graph:
tothat
Electric field strength (at a point) - the electrostatic force per unit positive charge acting
on a stationary point charge at that point
Coulomb’s law: (similar definition to newton’s law)
The electrostatic force between two point charges is proportional to the product of the
charges and inversely proportional to the square of their separation
Electric potential - the work done per unit positive charge in bringing a small test charge
from infinity to a defined point
E.P.E. - the total work done in bringing a test charge from infinity to that point
Potential gradient - the electric field at a particular point is equal to the negative gradient
of a potential-distance graph at that point
Capacitance
T
9f.it
atafeipiates
measured
in
Farad
E
A
d
lot
a spherical
conductor
V
gr
C
4TEur
ya
c
in
parallel total
C
Electric
potential
energy
W
Q V
area
under
potential
change
W
CV
w
p
in
to
learnthis
calculating
constant from
a
smoothed
discharge
v
on
use
vivie
T RC
c
13
as
increases
Inp
cuts
capacitor A transfers to the plates of capacitor B
(from smaller to larger capacitance)
Explain how there is an induced e.m.f across wire Q
during the discharge of the capacitor:
field
of wire P
Across Q
Capacitance (on two parallel plates) - the charge stored per unit potential difference on
the plates, where the charge is the charge on the plates and the p.d. Is the potential
difference between the plates
Capacitance (of a spherical conductor) - the charge per unit electric potential at the
surface of the sphere
Time constant - the time taken for the charge of a capacitor to decrease to 0.37 of its
original value
