Find the potential difference between A and B

Thread starter Fatima Hasan
Start date Mar 31, 2018
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Difference Potential Potential difference

1 reply · 1K views · last reply Mar 31, 2018

Fatima Hasan

Thread starter
Mar 31, 2018

Homework Statement

Multiple-choice question 12 with a diagram of a thin ring of radius R in the y-z plane, centre A, with point B at distance d on the x-axis; answer options (A) kQ/2R, (B) 3kQ/4R, (C) 2kQ/3R circled, (D) 4kQ/5R, (E) 5kQ/6R.

Homework Equations

V = kq / r

The Attempt at a Solution

V_A = k q / r_A
V_B = k q / r_B
r_B = √((√8 * R)² + R²)
= 3 R
V_B = k q / 3R
ΔV = | VA - VB |
= | kq / R - Kq / 3R |
= 2 kq / 3 R
Can somebody check my answer please ?

Discussion

kuruman

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Mar 31, 2018

Looks fine.