Question

19
31. The number of electrons present on the oil drop which has the static electric charge of
-3.02044 10 Cis
1)2 25
3)7
4)8​

Answer 1

Answer:

8

Explanation:

In Millikan's experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is −1.282×10

−18

C. Calculate the number of electrons present on it.

the static electric charge on the oil drop is, q=1.282×10

−18

C.

We know that Charge q=ne

where n is the no. of electrons and e is the charge of 1 electron, i.e. 1.602×10

−19

C

The number of electrons present in the oil drop is, n=

1.602×10

−19

1.282×10

−18

=8.