Things to Remember on Exam Questions

Question 1

Excitation:

Answer 1

-mention how the energy levels are discrete.
-energy of photons emitted is equal to difference between energy levels for electron.

Question 2

Fluroscent tube:

Answer 2

Excitation is caused by collisions between electrons due to pd across the gas.

Question 3

General rule of thumb:

Answer 3

Add ‘per second’ when talking about energy, collisions etc

Question 4

Work done equation for thermal physics:

Answer 4

Pressure × change in volume = Work done ( not in formula book must be derived )

Question 5

When comparing wave like and particle like:

Answer 5

Say what it would be like if it was a particle and then what it would be like for a wave.
-particle gives an instant energy transfer - waves don’t

Question 6

Line spectra and energy levels:

Answer 6

-mention different energy levels correspond to different frequencies/ wavelengths.

Question 7

When defining Kinetic energy (or energy for anything) of a photoelectron:

Answer 7

Maximum

Question 8

Graphs:

Answer 8

-be careful with gradients whether negative or not (especially with internal resistance)
-when a question gives you a graph (mostly electricity) - you always need to use it in further parts of the question, if stuck go back to the graph