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AS physics electricity- current and overloading plug sockets. watch

1. 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
2. (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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