A copper ball of density 8.0 g/cc and 1 cm in diameter is immersed in oil of density 0.8 g/cc. The charge on the ball if it remains just suspended in oil in an electric field of intensity 600π V/m acting in the upward direction is _________.
Fill in the blank with the correct answer from the options given below. (Take g = 10 m/s2)
1
2 × 10-6 C
2
2 × 10-5 C
3
1 × 10-5 C
4
1 × 10-6 C