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Science

bananas

(27,509 posts)

8. P = I^2 * R

Reply to hedgehog (Original post)

Wed Oct 23, 2013, 06:46 PM

Oct 2013

Power = Current Squared times Resistance

EMP induces a huge current.

Power is proportional to the square of the current.

That power is mostly dissipated as heat, causing circuits to evaporate in a puff of smoke, transformers to explode, batteries to explode and catch fire, etc.

Here's an example of a battery fire: a Tesla Motors car after an accident (no one was hurt, the firewall protected the passengers):

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A question about EMP - [View all] hedgehog Oct 2013 OP

the wire itself would be fine ProdigalJunkMail Oct 2013 #1

The problem is current generated by the EMP jeff47 Oct 2013 #2

ok - so would that mean , for example, that if the wires on a motor are thick enough, hedgehog Oct 2013 #3

Depends if the EMP hits the devices or not. jeff47 Oct 2013 #4

It would melt high tension cables about an inch thick Xipe Totec Oct 2013 #5

thank you all for taking the time to explain this to me! hedgehog Oct 2013 #6

If by any chance you should survive, catch the latest news on your Atwater Kent. dimbear Oct 2013 #7

P = I^2 * R bananas Oct 2013 #8