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Two insulated charged conducting spheres...

Two insulated charged conducting spheres of radii `20 cm` and `15 cm` respectively and having an equal charge of `10 C` are connected by a copper wire and then they are separted. Then

A

Both spheres will have equal charges

B

Surgace charge density on the 20 cm sphere will be greater than that on the 15 cm sphere

C

Surface charge density on the 15 cm sphere cm will be greater than that on the 20 cm sphere

D

Surface charge density on the two spheres will be equal .

Text Solution

Verified by Experts

Answer (3)
After touching potential will be same on both
`because U = (sigmar)/(epsilon_(0))` = constant then `sigma` r = constant
`sigma prop (1)/(r )`
So sphere of radius 15 cm has more surface charge density
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