Question

# Three identical metallic uncharged spheres A,B, and C each of radius a, are kept at the corners of an equilateral triangle of side d(d>>a) as shown in figure. The fourth sphere (of radius a), which has a charge q, touches A and is then removed to a position far away. B is earthed and then the earth connection is removed. C is then earthed. The charge on C is :

A
qa2d(2da2d)
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is C −qa2d(d−ad)In the first case when A is in contact with D:q1=q2In the second case, when B is earthed:kq1a+kq2d=0⇒q1=−qa2dIn the third case when C is earthed:kq2a+kq2d+kq1d=0⇒q2=−qa2d(d−ad)

Suggest Corrections
0
Join BYJU'S Learning Program
Select...
Related Videos
Electric Potential Due to Uniformly Charged Spherical Shell or Solid Sphere
PHYSICS
Watch in App
Join BYJU'S Learning Program
Select...