From the following, what charges can be present on oil drops in Millikan's experiment?

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Zero, equal to the magnitude of charge on $α$ -particle

$2 e, 1.6 \times 10^{- 18} C$

$1.6 \times 10^{- 19} C, 2.5 e$

1.5e, e

answer is B.

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Detailed Solution

In Millikan's experiment, the charges present on the oil drops are the integral multiples, so 2e and 10 e ( $1.6 \times 10^{- 18} C$ ) charges are present.

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