Question

15. An oil drop has 6,39 x 10" charge.
What will be the number of electrons in this
drop?
Marks (4) (-1)
Single choice
(A) 2
(B) 4
(C) S
(D) 10​

Answer 1

Explanation:

The charge on one electron is 1.60×10

−19

C.

From the formula q=n×e,

The number of electrons n=

1.60×10

−19

6.39×10

−19

=4.

Hence, the number of electrons in the drop is 4.

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