Explain why potential difference is necessary to produce current in a circuit.
Even at no-load, a transformer draws current from the mains. Why?
Explain the characteristics of inductor to be considered while designing it. What is the effect of over current and increase in temperature on inductor.
Why does increase in current mean a decrease in voltage? Answer : This is because current flows from high potential to low potential to bring the two diffrent potential to unity , thus a reduced potential (voltage)...
About trnsformer Answer : Acc to Ohms law V=IR but it is only applicable when our resistance R is constant, as in case of transformer we take impedence which is equivalent to resistance is not constant it varies with system parameters that why Ohms law not applicable in case of transformer...
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