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Home / Doubts and Solutions/NEET/Physics

The radio of two charged metal spheres are 5 cm & 10 cm both having same charge 75 mC . If they are connected by a wire the quantity of charge transferred through the wire is

Asked by Deepak 5th August 2018, 8:54 PM
Answered by Expert
Answer:
surface charge density σ1 of sphere that  has radius 5 cm = 75/(4π×25) = 0.24 mC/Sq.cm
 
surface charge density σ2 of sphere that  has radius 5 cm = 75/(4π×100) = 0.06 mC/Sq.cm
 
when the spheres are connected by wire, surface charge density will be same for both the sphere
 
hence surface charge density after the speres are connected by wire = 150/(4π×125)=0.0955 mC/Sq.cm
 
Charge on 5 cm radius sphere after connected = 0.0955×(4π×25) = 30 mC
 
Hence remaining 45 mC from 5 cm radius sphere will flow to 10 cm radius sphere through wire
Answered by Expert 6th August 2018, 11:16 AM
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