Comprehensive revision notes on Practical Skills from the Edexcel Physics A Level syllabus from an A* student in the 23/24 exam cycle. Complete with labelled diagrams and thoroughly fact checked and up to date.
, · Genera Exam Ties
When the
question asks for advantage of changing usually
·
an an experimental technique it
of 'uncertainty reduced and leads
expects an answer : will be to more accurate
value for MP2.
Smaller % U does smaller
NOT always uncertainty
·
mean
·
Give answers to save number of signtig's as the data in the question
.
Critiquing recording of data
·
-
Row data should all be recorded the
to some number of decimal places
-
processed data should be recorded to the same number of significant
figures as the rodata it came from
-
Independent variable should be atleast 6 different values ofgood range
-
All row data should be recorded
All units should be recorded quantities
-
next to
Take repeats
-
To improve ACCURACY :
reduces
·
Doing repeats and taking an average only the effect of random error .
·
Controlling the control variables well
~
Ensure rulers are vertical and read at level in order to reduce perallax
eye
Measure
·
as large a value as possible to reduce %
Uncertainty
.
·
Check for zero error on legth measurement instruments
·
Draw graphs and obtain gradients
data logger instead of stopwatch reduces
Using light gate +
the effect of
-
human reaction time and lowers percentage uncertainty
Use fiducial markers to help count oscillations
·
·
measure over several intervals and divide by number of intervals to
reduce
percentage uncertainty
.
·
Using datalogger
a :
Allows for short time
more
readings in a
-
-
Increases sample rate
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller physicsbyshane. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £4.99. You're not tied to anything after your purchase.
