Two charged metallic spheres of radii r 1 and r 2 are touched and separated. What is the…
Physics · JEE Main · NTA Exams — Electrostatics
Two charged metallic spheres of radii r1 and r2 are touched and separated. What is the ratio of their surface charge density.
- \(\frac{\sigma_{1}}{\sigma_{2}}=\frac{r_{2}}{r_{1}}\)
- \(\frac{\sigma_{1}}{\sigma_{2}}=\frac{r_{1}}{r_{2}}\)
- \(\frac{\sigma_{1}}{\sigma_{2}}=1\)
- \(\frac{\sigma_{1}}{\sigma_{2}}=\frac{r_{2} r_{1}}{r_{1}+r_{2}}\)
Answer
(A) _ 1 _ 2 = r_ 2 r_ 1
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