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A charged oil drop is suspended in uniform field of `3 xx 10^(4) Vm^(-1)` so that it neither falls nor rises. The charge on the drop will be ...(mass of the charge =`9.9xx 10^(-15)` kg

A

`3.3 xx 10^(-18)C`

B

`3.2 xx 10^(-18)C`

C

`1.6 xx 10^(-18)C`

D

`4.8 xx 10^(-18)C`

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The correct Answer is:
A
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