Question

Why do we get goosebumps and electric charge when we put out hand on the TV?​

Answer 1

Answer:

That, my friend, is called "Static Electricity"..

"Computer screens and television sets work on similar principles. Both produce static electric fields and alternating electric and magnetic fields at various frequencies.

CRT displays fire electrons at the back of the screen, creating something of an electrical charge on the surface and electrical field inside the cathode ray tube, with the electron beam being controlled by induced magnetic fields. Eventually a static charge may build up on the other side (viewer's side) of the screen. The entire tube itself is in fact a giant capacitor, and can hold an electrical charge for a very long time after the device has been unplugged.

Due to this the aforementioned sensation occurs.