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AS physics electricity- current and overloading plug sockets. watch

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    Hi,

    For homework we've had to research why increasing the current from 13A -15A is more likely to cause a fire than increasing it from 11-13A. We have to explain it in terms of the I-V characteristics of the wire and electrical power. This is the part that I'm stuck on.

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    (Original post by VioletPhillippo)
    Hi,

    For homework we've had to research why increasing the current from 13A -15A is more likely to cause a fire than increasing it from 11-13A. We have to explain it in terms of the I-V characteristics of the wire and electrical power. This is the part that I'm stuck on.

    Thanks
    P=VI

    V=IR

    so
    P=IRI... or I2R

    see what this means by calculating the power dissipated in a cable of constant resistance at those current levels
 
 
 
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