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The internal resistance of a device is the resistance in ohms of that device. It is the resistance electrons need to overcome before electricity is said to flow.

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Define the term critical field resistance?

critical resistance is the maximum resistance beyond which the generator failed to exite. it can b found form the occ of the generator.


Define electrical conductivity?

Conductivity is the inverse of resistance. Since Ohm's Law states that current is voltage divided by resistance, it also states that current is voltages times conductivity.


Formula to calculate min insulation resistance?

insulation resistance = (2 * operating voltage +1000V) at operating temperature if you define what you mean by minimum insulation resistance maybe i could help 132,000V on the towers is usually happy with 6' of air some insulation is far better than air dry air 500v/mill thermoplastics 6000v/mill your power drill has 1/8" - 1/4" of plastic on the cord and perhaps .001" on the wire in the coils the cord gets rougher handling anything practical insulation resistance (2 * operating voltage +1000V) witch means a 1500Vdc megger is ok for 120V appliances should be safe to handle if its more than 10megohms the 1500V will bridge any pinholes or airgaps NEVER use a vom the 9v battery wont find a pinhole or an air gap ceramic on heaters and toasters has a way of letting metals diffuse in it lowering the resistance over time also it usually lowers with temperature so the resistance reading will be a lot lower while its hot


To define current why do you use the term net charge crossing a plane?

We use the term net charge to define current due to unbalanced charges that flow.


Define a luminaire in BS7671?

a luminaire is defined as in bs7671

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Define the term critical field resistance?

critical resistance is the maximum resistance beyond which the generator failed to exite. it can b found form the occ of the generator.


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