Physics question

13

Hi, please could I have some help on question Ii on page 15? If qV equals 1/2mv^2, why isn’t V just 75V, isn’t that the potential difference between the two plates?
Paper: https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-4/QP/November%202018%20(v1)%20QP.pdf
Thanks!

Reply 1

Study Forum Helper

15

Original post

by anonymous56754

Hi, please could I have some help on question Ii on page 15? If qV equals 1/2mv^2, why isn’t V just 75V, isn’t that the potential difference between the two plates?
Paper: https://pmt.physicsandmathstutor.com/download/Physics/A-level/Past-Papers/CAIE/Paper-4/QP/November%202018%20(v1)%20QP.pdf
Thanks!

The p.d. between plate A and plate B is 75 V when they are 1.2 cm apart but for (b)(ii) the p.d. is across a distance of 0.40 cm NOT 1.2 cm.

Reply 2

OP

13

Original post

by Eimmanuel

The p.d. between plate A and plate B is 75 V when they are 1.2 cm apart but for (b)(ii) the p.d. is across a distance of 0.40 cm NOT 1.2 cm.

Ohh ok thank you

Quick Reply

Latest

Trending

Articles for you

Personal Statement:Physics 1

Personal Statement:Physics 4

Personal Statement - Physics 8

Personal Statement:Physics 32

How The Student Room is moderated

To keep The Student Room safe for everyone, we moderate posts that are added to the site.

Try out the app

Continue on web