Friday, January 8, 2010

What is mean by potential gradient , temperature gradient?

It is said that that the potential gradient of air is 30KV/cm. what does it actually mean?What is mean by potential gradient , temperature gradient?
That is amount of voltage drop in air per unit of distance, in this case a centimeter. It can different with different substances, for example oil has a much higher potential gradient and is used in some circuit breakers because of that.





You can extrapolate that a temperature gradient is similar, but it's more complex but it is not constant, it is a function of the temperature you start with, not just the difference.

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