QUESTION 7 Any time there is a combination of resistance and reactance in an AC

Question

QUESTION 7 Any time there is a combination of resistance and reactance in an AC circuit,-. O a. the circuit will resonate. O b.the current will be zero. O c. the total power in the circuit will be zero. O d. the voltage and current will be out of phase. QUESTION 8 In an AC circuit containing a resistor and capacitor in series, as we increase the frequency, the overall circuit impedance will O a.increase. O b.remain unchanged. O c.decrease. d.approach infinity. QUESTION 9 In an AC circuit, inductive reactance causes the O a. circuit to resonate. b.current to lag the voltage. Oc. current to equal the voltage. O d.current to lead the volatge.

Explanation / Answer

7. any time there is a combination of resistance and reactance in AC circuit the current and voltages are not in phase .Because total impendance consists of resistance and reactance. So there is a pahse shift in impedance .Due to this current also not in phase finally the voltage also out of phase.

8.In circuit consists of resistance and capacitor total impedance is inversly propostional to frequency.Whenver frequency increses the value of impendance will reuce i.e. cecreases.

9. In ac circuit reactance due to inductor causes current to lag voltage.

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