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Forums
Engineering
Electrical Engineering
Why electric devices do not draw more current than they need?
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[QUOTE="PhysicoRaj, post: 5503354, member: 399170"] A water tank contains of gallons of water (charge). The height at which it's placed is the pressure (voltage). The diameter of the outlet pipe(conductance) controls the flow rate (current). Now your resistance being the reciprocal of conductance, analyse how the flow rate (current) varies as you vary the diameter (resistance) as in a tap. You won't get all the water flowing in it at once, only the amount of water that can pass through the given diameter and at given pressure constitutes the flow. So holds I=V/R. [/QUOTE]
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Forums
Engineering
Electrical Engineering
Why electric devices do not draw more current than they need?
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