If gE and gM are the accelerations due to gravity on the surfaces of… | JEE Main 2007 (AIEEE)

Q124JEE Main 2007 · AIEEEMedium

Acceleration Due to Gravity

If $g_E$ and $g_M$ are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan's oil drop experiment could be performed on the two surfaces, one will find the ratio

$\frac{\text{electronic charge on the moon}}{\text{electronic charge on the earth}}\ \text{to be}$

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Answer: (b)

The electronic charge $e$ is a fundamental constant; it does not depend on $g$ .
Millikan's experiment measures the same $e$ anywhere, so the ratio is 1.
So the answer is (b) $1$ .

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