Question

The charge on the electron is-

• A. -9.1 $\times$ ${10}^{-31}$C.
• B. -1.6 $\times$ ${10}^{-19}$C.
• C. -1.7 $\times$ ${10}^{-19}$C.
• D. None of these

Answer 1

The correct option is B

-1.6 $\times$ ${10}^{-19}$C.

We have seen the Millikan oil drop experiment in the video.

The conclusion of the experiment was:

$\to$ The charge on the electron = 1.6022 $\times$ ${10}^{-19}$C.

$\to$ Because it was repelling the - ve charged plate, it should be negative.

$\to$ The magnitude of electric charge q, on the droplets is always an integral multiple of the electric charge, e.....

That is, q = ne, where n = 1, 2, 3 ....