Practicals Flashcards
1
Q
When measuring resistivity of a wire why is a potential divider circuit used?
A
Control current minimise heating effects
2
Q
What would you expect from the gradient of springs in parallel?
A
Twice the gradient than typical spring
3
Q
With stopping distance/ interrupter card practical d is proportional to…
A
v squared
4
Q
When is maximum power present in the load?
A
When internal resistance is equal to load resistance
5
Q
How can you deal with ln as an uncertainty?
A
Take the most extreme value apply ln find the difference to give the uncertainty (this works for badly behaved functions)
6
Q
What is the absolute uncertainty based of LOBF and LOWF?
A
The difference in the gradients
7
Q
What is the absolute uncertainty?
A
Smallest measurement you can take
