What is an EMP device?

[vitality00]

And how does it work

 

Here is what I am referring to

 

http://en.wikipedia.org/wiki/Electromagnetic_pulse

 

it doesn't talk about devices which utilize electromagnetic pulse but I think I saw in a movie where it was used to disable alot of electronic devices. does that have any truth to it in reality?

[Mordred]

Yes an EMP can fry electronics.

The page you linked includes different sources of EMP including man made. EMP causes induced voltages see induction.

http://en.m.wikipedia.org/wiki/Electromagnetic_induction

 

for example a lightning bolt can fry nearby electronics even if it doesn't hit them through electromagnetic induction

[vitality00]

So is an electromagnetic pulse just electromagnetic induction? like how transformers work....?

[Mordred]

Fairly close without going into too much detail. There is a ton on the subject on WWW. Including some protection methods though vs nuclear insufficient

[Enthalpy]

One can protect electronic circuits against a nuclear-produced EMP. Military circuits are protected since decades. It doesn't demand very expensive nor heavy hardware: it's more a matter of doing it properly, which isn't obvious.

 

By the way, the pulse produced by a nuclear detonation at altitude isn't necessarily stronger than from other sources, say a flux ciompressor. It harms a larger area.

[Vasanth M S]

It is an Electro Magnetic Pulse emitter. Most of these are banned and can harm any electronic equipments with the radius of the EMP device. Mostly the radius remains within 2-3 feet. Bring a mobile phone near it when the EMP device is on, and POOF goes your phone.