OCR Physics Multiple Choice Watch

rndmtngr99
Badges: 13
Rep:
?
#1
Report Thread starter 2 years ago
#1
Hi,

I found these OCR multiple choice questions for the exam and I'm getting most wrong and guessing the rest.

http://social.ocr.org.uk/groups/scie...tion-resources

Please could we all work out the answers because the sheet just gives you the answer and not how to get to it. Ones with uncertainties I'm finding really hard. Like cross sectional area uncertainty with a diameter?!

Thanks! Any tips for multiple choice would be great. This is the first year for this specification so there's not much help about.
0
reply
LisaSFC
Badges: 1
Rep:
?
#2
Report 1 year ago
#2
When combining uncertainties you can only combine absolute uncertainties if all of the units are the same, otherwise you need to convert to % uncertainties first. The rules are to add the uncertainties when adding, subtracting, dividing or multiplying quantities. When the quantity has a power e.g. is squared, multiply by the power so squared you would double the uncertainty.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Aston University
    Postgraduate Open Day Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19

Brexit: Given the chance now, would you vote leave or remain?

Remain (954)
79.9%
Leave (240)
20.1%

Watched Threads

View All