# A level physics multiple choice Q help - Electric force

Watch
Announcements
#1
Two identical positive point charges, P and Q, separated by a distance r, repel each other
with a force F. If r is decreased so that the electrical potential energy of Q is doubled, what
is the force of repulsion?

A 0.5 F
B F
C 2F
D 4F

I made a Voice note cos it's easiar:https://mote.fyi/3pd5dd8
0
1 month ago
#2
Potential is proportional to and force is proportional to . Does that help?
0
#3
(Original post by Callicious)
Potential is proportional to and force is proportional to . Does that help?
ohh. I already knew that but I just realised that I misread the Q. whoops.
0
1 month ago
#4
ohh. I already knew that but I just realised that I misread the Q. whoops.
Hi
Do you know how to answer these 2:
1)
2)
Last edited by Cherrygrape1234; 1 month ago
0
#5
(Original post by Cherrygrape1234)
Hi
Do you know how to answer these 2:
1)
2)
Nah, my school decided not to test us on magnetic fields and waves.
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

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

### Poll

Join the discussion

#### Do you think receiving Teacher Assessed Grades will impact your future?

I'm worried it will negatively impact me getting into university/college (170)
44.16%
I'm worried that I’m not academically prepared for the next stage in my educational journey (43)
11.17%
I'm worried it will impact my future career (31)
8.05%
I'm worried that my grades will be seen as ‘lesser’ because I didn’t take exams (83)
21.56%
I don’t think that receiving these grades will impact my future (36)
9.35%
I think that receiving these grades will affect me in another way (let us know in the discussion!) (22)
5.71%