In an oil drop experiment, the following charges (in arbitrary units) were found on a series of oil droplets:
$2.30 \times 10^{- 15}, 6.90 \times 10^{- 15}, 1.38 \times 10^{- 14}, 5.75 \times 10^{- 15}, 3.45 \times 10^{- 15},$ $1.96 \times 10^{- 14}$ . The experimental value suggests not possible magnitude of the charge on the electron is (in the same arbitrary unit)

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$2.30 \times 10^{- 15}$

$1.38 \times 10^{- 14}$

$6.90 \times 10^{- 15}$

$1.15 \times 10^{- 15}$

answer is A.

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Detailed Solution

$1.15 \times 10^{- 15}$ , which is the largest number which divides all the given experimental values of the charge.

The smallest charge noted is $2.3 \times 10^{- 15}$ but this charge doesn’t seem as unit charge, doesn’t divide others into even number of times.

Actually, it represents the charges of 2 electrons.

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