Can EMP destroy a turned-off electric system?

For example, my computer is completely shut down, can an EMP still break it? Or EMP can only destroy online systems?

6 Answers

  • 7 years ago
    Favorite Answer

    Yes - your electric system does not have to be powered up. The effects are induced.

    The major effect of a large EMP is to induce high currents and voltages in electrical systems, damaging them or disrupting their function. NEMP weapons are designed to maximise such effects, and are capable of destroying susceptible electronic equipment over a wide area. An indirect effect can be electrical fires caused by the high level of overload.

    Unless specifically hardened, semiconductor-based control systems are the most vulnerable grid device. Voltages as low as 50V can destroy the semiconductor materials inside a chip. An EMP can induce an electric field in the range of 10-50kV/m, easily damaging unshielded chips. In addition, any wire (such as a power cord, an antenna, or a network cable) aligned with the EMP can carry damaging voltage spikes inside a device.

  • 7 years ago

    I can understand the curious thoughts about EMP, but the fact is you'll probably never experience that in a manner strong enough to bother anything.

    I said it that way for a reason too. A device that is on even at a standby condition, already has some electrical charge working inside it; given added pulse and something is more likely to get hurt.

    Ask any old-timer about his radio tuned to music; and drive past a high power antenna; the other signal will bleed in.

    As for systems or devices turned off, if the EMP is massive damage could happen. It just isn't likely because today's manufacturers tend to make sensitive parts shielded, and consider stray signal grounding.

  • 4 years ago

    the two the Tibetans and Mayans the place given the accountability as 'time keepers' for the Planet as all of us be attentive to it to on the instant. the two say 2012 is the tip of the present 'application equipment'. The Planet won't be able to be destroyed yet there'll be an axis shift which will carry a pair of recent face with the point to talk for mom Earth. historic this has take place fairly some situations in our Planet's historic past. not often does the scientific and non secular communities agree on some thing especially some thing like an axis shift. The scientific community reported 2 years in the past the magma on the middle of the Planet has already shifted and that they don't understand why the axis shift has no longer already handed off. Are you waiting for some 'Rock and Roll'?

  • 7 years ago

    EMP can easily destroy electronic components that are not connected. It cannot usually do any harm to straight electrical wiring and components, however.

    Your computer generally is always connected to your household supply, unless you have totally removed plugs. But it still could be destroyed by induced voltages destroying the electronic components.

  • How do you think about the answers? You can sign in to vote the answer.
  • 7 years ago

    No it can't do anything. It is just like an AC transformer which does not have a connection between the primary coil and the secondary. The primary coil sends out an electromagnetic wave that is picked up in the secondary coil, but if the transformer is turned off at the secondary coil, the secondary will not induce a current to flow because of that break in the circuit.

    So your computer would do the same thing. The pulse would try to energize any coil in your computer frame, but with no current to flow from that magnetic impulse, nothing would happen

  • 7 years ago

    Yes it is possible for an electromagnetic pulse to damage your computer even though it wasn't turned on but ; if that happened and you were nearby, you would be beyond caring whether or not it damaged your computer.

    It can be done by a nuclear detonation.

Still have questions? Get your answers by asking now.