Physics jee mains questions

Question

. A thin conducting spherical shell (center at 0) having charge Q., radius R and three point charges Qoy -20, 30, are also kept at point A, B and C respectively as shown. Find the potential at any point on the conducting shell. (Potential at infinity is assumed to be zero) Q: R/2 2R 2R/3 300 (2) 3 KQ, (2) 2 R (4) None of these

Answer 1

we need to find potential at O (according to question it says on the sphere but actually we need to find inside)

Vo =  kQo/R + kQo/R/2 + K3Qo/2R + (-2Qo)/2R/3 = 3KQo/2R