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`A` sings with a frequency `n` and `B` sings with a frequency `1//8` that of `A`. If the energy remains the same and the amplitude of `A` is `a`, then amplitude of `B` will beA. `a_(0)`B. `2a_(0)`C. `8a_(0)`D. `16a_(0)` |
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Answer» Correct Answer - C Power factor `cosphi=(R)/(z)`, where impedence `z=sqrt(R^(2)+(X_(L)-X_(C))^(2))` where `(X_(L)-X_(C))` in known as reactance `because cosphi=(3)/(5)=(R)/(Z)impliesZ=5` and `Z=sqrt(R^(2)+(X_(L)-X_(C))^(2))implies(X_(L)-X_(C))=4` |
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