1.

The RL circuit of the figure is fed from a constant magnitude, variable frequency sinusoidal voltage source Vin. At 100 Hz, the R and L elements each have a voltage drop μRMS. If the frequency of the source is changed to 50 Hz, then new voltage drop across R is

A. \(\sqrt {\frac{5}{8}} {{\rm{\mu }}_{RMS}}\;\)
B. \(\sqrt {\frac{2}{3}} {{\rm{\mu }}_{RMS}}\)
C. \(\sqrt {\frac{8}{5}} {{\rm{\mu }}_{RMS}}\)
D. \(\sqrt {\frac{3}{2}} {{\rm{\mu }}_{RMS}}\)
Answer» D. \(\sqrt {\frac{3}{2}} {{\rm{\mu }}_{RMS}}\)


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