GEO 2025Q2
Q: A spherical conductor of radius a has a cavity of radius b at its centre such that a > b. A positive charge q is placed at its centre (see figure). The electric fields in the regions b < r < a and r > a are respectively
(a)q/(4π ε0 a²) inward and q/(4π ε0 b²) outward
(b)q/(4π ε0 r²) inward and zero
(c)zero and q/(4π ε0 r²) outward
(d)zero and zero
Answer pending verification