Physics - Electrostatics Question with Solution | TestHub

A copper ball of density $8.6g/c{\mathrm{m}}^3$, 1 cm in diameter is immersed in oil of density $0.8g/c{\mathrm{m}}^3$. What is the charge in $\mu C$ on the ball, if it remains just suspended in an electric field of intensity $3600V/m$ acting in the upward direction? (nearest integer)