What is an ideal gas?
one which obeys the equation of state pV∝T at all pressures, volumes and thermodynamic temperatures.
How does movement of gas cause pressure in the container:
Molecule collides with wall
Momentum of molecule changes during collision
Many forces act over the surface area of the container, exerting pressure.
What is Simple harmonic motion
the motion of a particle about a fixed point such that its acceleration is proportional to the distance from said fixed point, in the opposite direction to acceleration
Ek for SHM
(0.5)mw²((x0)²-(x)²)
What is photon energy equation
work function energy + maximum kinetic energy of photoelectron
electric field meaning
region where a stationary charge experiences a force.
uniform field meaning
electric field strength is the same at all points in the field.
Capacitance of a parallel plate capacitor
charge stored on one plate per unit P.D.
difference in charge between the plates.
Capacitance
ratio of charge and potential difference
Why does capacitor store energy but not charge?
Capacitor has equal negative and positive charges
Total charge on capacitor is 0
Positive and Negative charges are separated
Work is done to achieve this, so it stores energy
Magnetic field definition
region of space where a magnetic pole experiences a force.
Faraday’s law of EM
e.m.f induced is proportional to the rate of change of magnetic flux linkage.
Tesla definition
magnetic field normal to the current, newton per ampere per metre
Aluminium ring jumps up when the ferrous core with a coil of insulated wire around is supplied with energy
Current in coil produces a flux
Changing flux induced e.m.f in ring
Current in ring causes field
Field around ring opposes the field around coil.
A metal ring in between two magnets completes fewer oscillations than one with no magnets nearby because
Ring cuts magnetic flux and causes induced e.m.f in ring
E.m.f causes eddy currents
Currents in ring causes magnetic field around ring
Two fields interact to cause resistive force
