Electrostatics Question 50

Question: Two metallic charged spheres whose radii are 20cm and 10cm respectively, have each 150microcoulomb positive charge. The common potential after they are connected by a conducting wire is [MP PMT 1991]

Options:

A) 9×106 volts

B) 4.5×106 volts

C) 1.8×107 volts

D) 13.5×106 volts

Show Answer

Answer:

Correct Answer: A

Solution:

Common potential V=Total charge Total capacitance

V=150×106×24πε0(10×102+20×102)=9×106V



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