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In superconductors , for example mercury at 4.2K , the resistance becomes zero allowing charges to flow through it without any loss in energy .
WKT , I=V/R as per ohms law,
When R=0 , I=V/0=infinity .
How can current flow through it , how can we supply infinity current , HOW ?
Four cells of emf 'E' are joined in parallel to form a battery. The equivalent emf of battery will be _________
If four 100 W devices are used daily for 2 hours, what will be the electricity bill for 30 days The cost for one unit is 1 rupee.
a wire carrying current I and other carrying current 2I in the same direction produce a magnetic field B at the mid point.What will be the field when 2I wire is switched off?
the main source of biomass is
ohm's law is
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