In Millikan’s oil drop experiment, what is the terminal speed of an uncharged drop of radius \(2\times10^{-5}\) m and density \(1.2\times10^{3}\) kg-m–3? (Take the viscosity of air at the temperature of the experiment to be \(1.8\times10^{-5}\) Pa-s.)
1. | \(2.7\) cm/s | 2. | \(3.9\) cm/s |
3. | \(5.8\) cm/s | 4. | \(4.6\) cm/s |
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