Keeping the power same of the source if I is increased, then will V increase or decrease? Does it violate Ohm’s law? If not, justify your answer. Give an example where the same principle is applied in our daily life.
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Hey dear,
◆ Answers with explaination -
Let me answer your queries one by one.
Voltage in the circuit is given w.r.t. power & current as -
V = P / I
If power of the source is kept same, increase in current will decrease the voltage.
V ∝ 1/I
But, according to Ohm's law, V ∝ I. So you may think it violates Ohm's law, but it doesn't. This is because Ohm's law when circuit (resistance) remains same, which clearly doesn't in maintaining same power.
Example - Transformer
In transformers, power is kept constant while voltage & current are interchangeable. In step-up transformer, voltage increases as current decreases. In step-down transformer, voltage decreases as current increases.
Thanks for asking...
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