An oil drop of radius 2 mm with density 3 gcm−3 is held stationary under a constant electric field 3.55×105Vm−1 in the Millikan’s oil experiment. What is the number of excess electrons that the oil drop will possess? Consider g=9.81 m/s2

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

1.73×1010

4.8×1011

17.3×1010

17.3×1012

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Electric force is balanced by gravitational force. FE = FG ⇒ neE=mg ⇒n=mgeE=ρV×geE=3000×43π2×10-33×9.811.6×10-19×3.55×105 ⇒n=1.73×1010

Watch 3-min video & get full concept clarity