Physics Electrostatics Potential & Capacitance Karnataka - CET Previous Year Question MCQ (Single Correct)

Two metal spheres of radii and are given a charge of and respectively. They are then connected by a wire. The final charge on the first sphere is .

A
40
B
30
C
20
D
10

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Verified by Experts
The correct answer is:
C

The situation is as shown in the figure.

When they are connected by a wire the charge flows and both the spheres attain the common potential which is given by

Final charge on the first sphere is

Here,

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