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An oil drop has a charge -9.6xx10^(-19) ...

An oil drop has a charge `-9.6xx10^(-19) C` and mass `1.6xx10^(-15)` gm. When allowed to fall, due to air resistance force it attains a constant velocity. Then if a uniform electric field is to be applied vertically to make the oil drop ascend up with the same constant speed, which of the following are correct. `(g=10 ms^(-2))` (Assume that the magnitude of resistance force is same in both the cases)

A

The electric field is directed upward

B

The electric field is directed downward

C

The intensity of electric field is `1/3xx10^(2) NC^(-1)`

D

The intensity of electric field is `1/6xx10^(5) NC^(-1)`

Text Solution

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The correct Answer is:
B, C
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