Two charges lie on the x axis, +3q at the origin, and -2q at x = 5.0 m. The point on the x axis where the electric potential has
a zero value (when the value at infinity is also zero) is
a. 1.0 m.b. 2.0 m.c. 2.5 m.d. 3.0 m.e. 4.0 m.
1 answer:
Answer:
Explanation:
q1 = 3q at (0,0)
q2 = - 2q at (5, 0)
Let the potential is zero at a distance x from the origin
![V_{1}+V_{2}=0](https://tex.z-dn.net/?f=V_%7B1%7D%2BV_%7B2%7D%3D0)
![\frac{k\times 3q}{x}-\frac{k\times 2q}{5-x}=0](https://tex.z-dn.net/?f=%5Cfrac%7Bk%5Ctimes%203q%7D%7Bx%7D-%5Cfrac%7Bk%5Ctimes%202q%7D%7B5-x%7D%3D0)
15 - 3x = 2x
5x = 15
x = 3 m
Thus, the potential is zero at x = 3 m .
Option (d) is true.
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