1.

A charged oil drop is suspended in uniform field of 3 xx 10^4 V/m so that it neither falls nor rises. The charge on the drop will be take the mass of the charge = 9.9 xx 10^(-13) kg & g =10 m//s^2)

Answer»

`3.3 XX 10^(-18)C`
`3.2 xx 10^(-18) C`
`1.6 xx 10^(-18)C`
`4.8 xx 10^(-18)C`

ANSWER :A


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