Question: The magnitude of the charge on an electron is 1.6 × 10-19 C; it is negatively charged.
a. Could Millikan have done his experiment with the air pumped out of the volume of space where he made an electric field, i.e., between the plates? Why?
b. Find the mass of a droplet of oil of density 0.92gcm-3 if the radius of a droplet is 3 μm.
c. An electric potential difference of 5000V is put across two large conducting plates separated by 2cm. What is the value of the electric field in the space between the plates?
d. If an electric field of 300kV/m exerts a force of 4.8 ×10-14 N on an electrically charged drop of oil, how much is the electric charge of the oil drop?