Electric Potential V at Point P: Multiple Choice

AI Thread Summary
The discussion revolves around calculating the electric potential at point P, located between two concentric spherical conducting shells. The inner shell has a radius of a and charge q1, while the outer shell has a radius of 3a and charge q2. The key point is that electric potentials are additive, meaning the total potential at point P is the sum of the potentials due to both charges. The potential at point P is expressed as V = K(q1/a + q2/3a), which reflects the contributions from both shells. The correct answer to the multiple-choice question is option 6.
srhly
Messages
17
Reaction score
0
Can anybody help me on this question, I'm stuck. I have a picture attached for clarification.

Consider two concentric spherical conducting shells. O is at the center of the shells. THe inner shell has radius a and charge q1 on it, while the outer shell has radius b=3a and charge q2 on it. Find the electric potential at point p, where p is in between the two shells and OP= 2a.

Which represents the electric potential V at point p?
1. V = 0
2. V = infinity
4. V = K[(q1/2a)+(q2/3a)]
5. V = K(q1+q2)/3a
6. V = K(q1/a + q2/3a)

I have already found that answer 3 was wrong so I didn't include it.
 

Attachments

  • physicshelp.JPG
    physicshelp.JPG
    8.3 KB · Views: 717
Physics news on Phys.org
Potential are "linear", i.e. V at p = V cause by q1 + V cause by q2.
 
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Back
Top