Question

Inside a television picture tube there is a build-up of electrons (charge of 1.602 × 10–19 C) with an average spacing of 38.0 nanometers between electrons. Find the electric field inside the picture tube. (Round to three significant figures.)

Answer 1

Answer:

Electric field, $E=9.97\times 10^5\ N/C$

Explanation:

We have,

Charge on electron is $1.602\times 10^{-19}\ C$

Distance between electron is 38 nm.

It is required to find the electric field inside the picture tube. The electric field at a distance r is given by :

$E=\dfrac{kq}{r^2}\\\\E=\dfrac{9\times 10^9\times 1.6\times 10^{-19}}{(38\times 10^{-9})^2}\\\\E=9.97\times 10^5\ N/C$

So, the electric field inside the picture is $9.97\times 10^5\ N/C$

Answer 2

Answer:

997,000

Explanation: