Questions
Two metal spheres, one of radius R and the other of radius 2R respectively have the same surface charge density . They are brought in contact and separated. What will be the new surface charge densities on them?
detailed solution
Correct option is A
Q1=σ4πR12=σ4πR2 Q2=σ4π(2R)2=σ16πR2 After Redistribution of charges Q1'Q2'=R2R⇒Q2'=2Q1' ..(i) Q1'+Q2'=20σπR2 ...(ii) From eq. (i) and (ii) Q1'=203σπR2⇒σ1'=53σQ2'=403σπR2⇒σ2'=56σTalk to our academic expert!
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