Advanced Higher Physics learning outcomes Electrical Phenomena

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Oct 18, 2013 (3 years and 5 months ago)

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Advanced Higher Physics learning outcomes

Electrical Phenomena

2.1 Electric Fields

Carry out calculations involving Coulomb’s law for
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2.1 Electric fields (cont)

Describe the effect of placing a conducting shape in
an electric field: the induced charge resides on the
surface of the conductor, inside the shape the
electric field is zero, and outside the shape the
electric field is

perpendicular to the surface of the
conductor.


State that
the electrostatic potential at a point is
the work done by the external forces in bringing
unit positive charge from infinity to that point.


Carry out calculations involving potentials due to
p
oint charges


Describe the motion of charged particles in uniform
electric fields.




Carry out calculations concerning the motion of
charged particles in uniform electric fields.


State that relativistic effects must be considered
when the velocity of
a charged particle is more than
10% of the velocity of light.


Carry out calculat
ions involving the head
-
on collision
of a charged particle with a fixed nucleus.


Explain how the results of Millikan’s experiment
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2.2 Electromagnetism

State that a magnetic field exists around a moving
charge in addition to its electric field.


State that a charged particle moving across a
magnetic field experiences a force.


Describe how the concept of a magnetic field is

used to explain the magnetic force exerted by
current
-
carrying conductors on each other.


State that one tesla is the magnetic induction of a
magnetic field in which a conductor of length one
metre, carrying a current of one ampere
perpendicular to the f
ield is acted an by a force of
one Newton.


Carry out calculations involving current carrying
conductors in magnetic fields.


State the relative directions of current, magnetic
field and force for a current
-
carrying conductor in
a magnetic field.




Car
ry out calculations involving the magnetic fields
around “infinite” straight current carrying
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2.3 Motion in a magnetic field

Derive the relationship F=qvB for the magnitude of
the force acting on a charge
q

moving with speed
v
perpendicular to a magnetic field B, using the
relationship F=IlBsin


.



S
tate that if the charge’s velocity vector is not
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2.4 Self
-
inductance

Sketch qualitative graphs of the growth and decay
of current in a d.c. circuit containing an inductor.




Describe the principle
s of a method to illustrate
the growth of current in a d.c. circuit.



State that an e.m.f is induced across a coil when
current through the coil is varying.


Explain the production of the induced e.m.f across a
coil.




Explain the direction of the ind
uced e.m.f in terms
of energy.


State that the inductance of an inductor is one
henry if an e.m.f of one volt is induced when the
current changes
at a rate of one ampere per second.



Carry out calculations involving the relationship
between self
-
induced

e.m.f in a coil, self inductance
and the rate of change of current.


Explain that the work done in building up the
current in an inductor is stored in the magnetic
field of the inductor.





2.4 Self
-
inductance

Explain that the energy stored in the magn
etic field
of an inductor may be a source of e.m.f.




Carry out calculations involving the relationship
between energy stored in an inductor, self
inductance and current.


Describe the principles of a method to show how
the current varies with frequency

in an inductive
circuit.



Describe and explain the possible functions of an
inductor


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2.5 Forces of nature

State that nuclear particles attract each other with a
force called the strong force.



State that the strong force has a short

range < 10
-
14
m.



State that the weak force is associated with beta
decay.



State that there are a number of “elementary”
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