1.

From the following, what charges can be present on oil drops in Millikan's experiment          [MP PET 1995]

A.   Zero, equal to the magnitude of charge on \[\alpha -\]particle
B.   \[2e,\ 1.6\times {{10}^{-18}}C,\] 
C.   \[1.6\times {{10}^{-19}}C,\ 2.5e\]
D.   \[1.5e,\ e\] (Here e is the electronic charge)
Answer» C.   \[1.6\times {{10}^{-19}}C,\ 2.5e\]


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