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A negatively charged particle called Neg...

A negatively charged particle called Negatron was discovered. In the Millikan's oil-drop experiment, the charges of the oil-drops in five experimetns are reported as `3.2xx10^(-19)` coulomb, `4.8xx10^(-19)` coulomb, `6.4xx10^(-19)` coulomb `8xx10^(-19)` coulomb and `9.6xx10^(-19)` coulomb. Calculate the charge on the negatron.

Text Solution

Verified by Experts

In millikan's oil-drop experiment, the charges on the oil-drops are integral multiples of the cahrge of the particle. Dividing the charges of droplets by the lowest charge:
(i). `(3.2xx10^(-19))/(3.2xx10^(-19))=1`
(ii). `(4.8xx10^(-19))/(3.2xx10^(-19))=1.5`
(iii). `(6.4xx10^(-19))/(3.2xx10^(-19))=2`
(iv). `(8xx10^(-19))/(3.2xx10^(-19))=2.5`
(v). `(9.6xx10^(-19))/(3.2xx10^(-19))=3`
All the values are not integral, they can be converted to integers on multiplying by 2.
`therefore` Charge of the negatron will be
`(3.2xx10^(-19))/(2)=1.6xx10^(-19)C`.
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