Electric Fields Calculation Specimen Paper 2 AQA Watch

mahmed69
Badges: 9
Rep:
?
#1
Report Thread starter 1 month ago
#1
An α particle makes a head-on collision with a gold nucleus containing 79 protons. The distance of closest approach of the α particle to the nucleus is 4.0 × 10^−14 m.
What electrostatic force acts on the gold nucleus when at this separation?

A) 9.1 × 10^−11 N
B) 23 N
C) 290 N
D) 1.4 × 10^20 N
0
reply
justsomeguy17
Badges: 11
Rep:
?
#2
Report 1 month ago
#2
Use the equation for the force between two point charges, what are the charges on the nucleus and alpha particle?
0
reply
mahmed69
Badges: 9
Rep:
?
#3
Report Thread starter 1 month ago
#3
yeah i did that, keep getting B which isn't right
(Original post by justsomeguy17)
Use the equation for the force between two point charges, what are the charges on the nucleus and alpha particle?
0
reply
homemadeclock
Badges: 10
Rep:
?
#4
Report 1 month ago
#4
post ur workings
0
reply
justsomeguy17
Badges: 11
Rep:
?
#5
Report 1 month ago
#5
23N is the correct answer, the mark scheme is wrong.
0
reply
mahmed69
Badges: 9
Rep:
?
#6
Report Thread starter 1 month ago
#6
100% sure yeah?
my workings
F=(1/(4Pi*8.85x10^-12)) * (79x(1.6x10^-19)*2(1.6x10^-19)/(4x10^-14)^2)
=23N
(Original post by justsomeguy17)
23N is the correct answer, the mark scheme is wrong.
0
reply
justsomeguy17
Badges: 11
Rep:
?
#7
Report 1 month ago
#7
Yeah it's a specimen paper so they'll be a few mistakes. I've seen videos on youtube of people solving this question and they get the same answer 23N, I've also asked my physics teachers and they get 23N as well. Rest assured :P
(Original post by mahmed69)
100% sure yeah?
my workings
F=(1/(4Pi*8.85x10^-12)) * (79x(1.6x10^-19)*2(1.6x10^-19)/(4x10^-14)^2)
=23N
0
reply
mahmed69
Badges: 9
Rep:
?
#8
Report Thread starter 1 month ago
#8
ah i seee i did the rest of the paper as well, some of the questions/answers are such nonsense. Just sums up AQA I guess

any predictions for tomorrow?
(Original post by justsomeguy17)
Yeah it's a specimen paper so they'll be a few mistakes. I've seen videos on youtube of people solving this question and they get the same answer 23N, I've also asked my physics teachers and they get 23N as well. Rest assured :P
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

Are you tempted to change your firm university choice now or on A-level results day?

Yes, I'll try and go to a uni higher up the league tables (127)
19.54%
Yes, there is a uni that I prefer and I'll fit in better (62)
9.54%
No I am happy with my course choice (368)
56.62%
I'm using Clearing when I have my exam results (93)
14.31%

Watched Threads

View All