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  4. An oil drop carrying a charge of 2 electrons has a mass of 3.2× 10- 17 kg . It is falling freely in the air with terminal speed. The electric field required to make the drop move upwards with the same speed is

Q. An oil drop carrying a charge of electrons has a mass of . It is falling freely in the air with terminal speed. The electric field required to make the drop move upwards with the same speed is

NTA AbhyasNTA Abhyas 2022 Report Error

Solution:



viscous force (initially) ......(i)

now motion upwards


Put value from (i) in (ii)

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