The charge on the electron is 1.6 × 10-19 C. The number of electrons need to be removed from a metal sphere of 0.05 m radius so as to acquire a charge of 4 × 10-15 C is
A. 1.25 × 104
B. 1.25 × 10³
C. 2.5 × 10³
D. 2.5 × 104
Answer:D
The charge on the electron is 1.6 × 10-19 C. The number of electrons need to be removed from a metal sphere of 0.05 m radius so as to acquire a charge of 4 × 10-15 C is
A. 1.25 × 104 B. 1.25 × 10³ C. 2.5 × 10³ D. 2.5 × 104