If the frequency omega increases, the amplitude of the voltage gain: (a) increas

Question

If the frequency omega increases, the amplitude of the voltage gain: (a) increases, (b) decreases, (c) remains as a constant, (d) is 1. If the Thevenin equivalent impedance of a source is Z_th = R_th + j X_th and the load impedance is Z_L = R_L + j X_L, maximum power is transferred when: (a) Z_th = R_L, (b) Z_th = X_L, (c) Z_th = Z_L, (d) Z_th = Z_L. As far as the load is concerned, power factor is equal to 1 when the load is: (a) purely resistive, (b) purely inductive, (c) purely capacitive, (d) 3 + j4 ohm. Assuming the average power P supplied from a source voltage V are fixed, If the power factor is increased, the amplitude of the source current i will: (a) increase, (b) decrease, (c) remain the same, (d) become 0. Given an RLC series circuit (a resistor, inductor, and capacitor connected in series) connected to an AC voltage with a frequency of omega, the power factor is 0.8 lagging. When omega increases, which of the following is true: (a) power factor > 0.8, (b) power factor

Explanation / Answer

11) maximum power is transferred when ZL=CONJUGATE OF ZTH

OPTION:D

12) PURELY RESISTIVE

OPTION:A

13) DECREASES

OPTION:B

14) POWER FACTOR< 0.8

OPTION:B

15) DECREASES w

OPTION:B

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