The electric potential immediately outside a charged conducting sphere is 230 V,

Question

The electric potential immediately outside a charged conducting sphere is 230 V, and 10.0 cm farther from the center of the sphere the potential is 110 V. (a) Determine the radius of the sphere. _____________ cm (b) Determine the charge on the sphere. ___________nC The electric potential immediately outside another charged conducting sphere is 260 V, and 10.0 cm farther from the center the magnitude of the electric field is 380 V/m. (c) Determine all possible values for the radius of the sphere. (Enter your answers from smallest to largest. If only one value exists, enter "NONE" in the second answer blank.) r1 = cm r2 = cm (d) Determine the charge on the sphere for each value of r. (If only one value exists, enter "NONE" in the second answer blank.) q1 = nC q2 = nC

Explanation / Answer

If the radius is r metres, then going from r to (r + 0.1) causes V to drop from 220V to 130V.

220 = kq/r

130 = kq/(r+0.1)

Dividing gives:

220/130 = (r+0.1)/r

1.692 = 1 + 0.1/r

0.1/r= 0.692

r= 0.1/0.692=0.144m

q = 220r/k = 220 x 0.144 /9x10^9 = 3.52x10^-9 C cheers....:)

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.