A sine wave voltage source is connected across a series combination of a resistor and an inductor.The frequency is set so that inductive reactance is equal to resistance.If the frequency is increased then
A. Vr>Vl
B. Vr<Vl
C. Vl=Vr
D. none of the above
Explanatory answer:
XL=2*pi*f*L
as f increases XL increases
so voltage drop across inductor, IXL increases but voltage drop across resistance remains same because resistance not depends on frequency.
The correct answer will be: Vr< Vl
A. Vr>Vl
B. Vr<Vl
C. Vl=Vr
D. none of the above
Explanatory answer:
XL=2*pi*f*L
as f increases XL increases
so voltage drop across inductor, IXL increases but voltage drop across resistance remains same because resistance not depends on frequency.
The correct answer will be: Vr< Vl
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