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Standard XII

Chemistry

Intermolecular Forces

A charged oil...

Question

A charged oil drop is held stationary in an electric field. The space surrounding the drop is exposed to a radioactive source and the drop moves with different terminal velocities v, 2v, 3v etc. It is inferred that

Charge is conserved.

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Drop carries negative charge.

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Charge is quantized.

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Drop carries positive charge.

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Solution

The correct option is D Charge is quantized.
$F_{e} = F_{g} + F_{v}$
$q E = m g + 6 π η r v$
except for v, q all are constants.
given that terminal velocites are in form of 1v,2v,3v etc
This implies that q also changes in form of 1q,2q,3q etc and thus charge is quantized.
So, the answer is option (C).

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A charged oil drop is held stationary in an electric field. The space surrounding the drop is exposed to a radioactive source and the drop moves with different terminal velocities v, 2v, 3v etc. It is inferred that

The correct option is D Charge is quantized.Fe=Fg+FvqE=mg+6πηrvexcept for v, q all are constants.given that terminal velocites are in form of 1v,2v,3v etcThis implies that q also changes in form of 1q,2q,3q etc and thus charge is quantized.So, the answer is option (C).