Exam Questions (Question Pack Redos)

Question 1

Answer 1

Question 2

Answer 2

Question 3

Answer 3

Question 4

Answer 4

Question 5

In an experiment which involved measuring time, a student used a stopwatch - describe how different apparatus could be used to measure the time so that the % uncertainty is reduced

Answer 5

Either use a light gate and data logger for a more accurate determination of time
Or a video camera which can be analysed frame by frame

Question 7

Describe one safety precaution when carrying out the speed of stationary wave on string practical

Answer 7

Wear suitable footwear (to protect from falling masses)
Wear safety glasses (in case teh string breaks)

Question 8

When using a micrometer, give 1 technique for measuring stuff well

Answer 8

Look at the micrometer from different orientations along the wire
As the wire diameter may not be uniform
OR
Check for 0 error
As zero error reduces the accuracy of measurement

Question 9

When describing how a vibrating string causes pressure variations in the air: how do you describe how the molecules oscillate?

Answer 9

Molecules are displaced from equilibrium positions

Question 10

Never say larger amplitude (when describing standing waves) instead say ____amplitude

Answer 10

Maximum

Question 11

Explain why waves need to be coherent to produce a standing wave

Answer 11

Coherent means the waves have a constant phase relationship
If the relationship is not constant, a point could be sometimes constructive and sometimes destructive

Question 12

Answer 12