Coulomb's Law and net electric field

AI Thread Summary
The discussion revolves around calculating the net electric field produced by two negative point charges, q1 and q2, at specific points A and B. The net electric field at point A is determined to be 10,360 N/C directed to the right, while at point B, it is 6,068.6 N/C, also directed to the right. The main challenge lies in finding the magnitude and direction of the electric force on a proton at point A, which remains unresolved. Participants are encouraged to focus on the relationship between electric field units (Newtons per Coulomb) and the force calculation. The conversation emphasizes the need for clarity in applying these concepts to solve the final part of the problem.
yb1013
Messages
55
Reaction score
0

Homework Statement



Two point charges q1 = -5.60 nC, and q2 = -14.0 nC are separated by 25.0 cm (see figure below).

http://www.webassign.net/yf12/21-p-031-alt.gif

(a) Find the net electric field these charges produce at point A
magnitude 10360 N/C
direction is to the right

(b) Find the net electric field these charges produce at point B.
magnitude 6068.6 N/C
direction is to the right

(c) What would be the magnitude and direction of the electric force this combination of charges would produce on a proton at A?
magnitude ______ N
direction is to the right


The Attempt at a Solution


Okay well you can see that I figured out all of the answers except for the last magnitude, it seems to be really easy but I think I am just doing something little wrong, not sure.
Can someone please help with what I have to do?
Thank you!
 
Physics news on Phys.org
There is a strong hint in the units of the electric field you calculated: Newtons per Coulomb.
 
I'm still not quite sure where you're going with that. I tried a couple things but I ended with the wrong answer..
 
What did you try?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Minimum mass of a block'

Thread 'Minimum mass of a block'

Here we know that if block B is going to move up or just be at the verge of moving up ##Mg \sin \theta ## will act downwards and maximum static friction will act downwards ## \mu Mg \cos \theta ## Now what im confused by is how will we know " how quickly" block B reaches its maximum static friction value without any numbers, the suggested solution says that when block A is at its maximum extension, then block B will start to move up but with a certain set of values couldn't block A reach...
View full post »
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
View full post »

Similar threads

Coulomb's Law and the net electric field
Replies
2
Views
12K
No Electric Charges if No Electric Field in Region
Replies
22
Views
2K
Capacitors, equipotentials, and electric fields
Replies
5
Views
914
Why Does the Electric Field Sum Instead of Cancel with Opposite Charges?
Replies
6
Views
2K
Find the magnitude of the electric field at point P
Replies
5
Views
2K
I Thought I Understood Gauss' Law (Sheets)
Replies
26
Views
2K
Coulomb's law to find electric field for charge density function
Replies
11
Views
1K
Confused about direction of electric field
Replies
7
Views
3K
Calculating the magnitude of the total electric field at P
Replies
3
Views
3K
Find the magnitude of the electric force from 3 charges at vertices of a cube
Replies
17
Views
2K

Hot Threads

Recent Insights

Back
Top