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Chapter 6. 6. A.C. CIRCUIT (SINGLE‐PHASE). 6.1. AC THROUGH PURE RESISTIVE CIRCUIT. MCQs

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1. . When two AC waves having the same frequency start & finish from the same point collectively then these are called:





2. . The line which has specific direction and length is called:





3. . The waveform which is behind the other waveform w.r.t time or angle is called:





4. . The waveform which is ahead of the other waveform w.r.t. time or angle is called:





5. . Formula to find the impedance of the RC series circuit is:





6. . The unit of impedance is:





7. . In the impedance triangle, the base indicates:





8. . In the impedance triangle, the hypotenuse indicates:





9. . In the purely resistive circuit, the current & voltage are:





10. . The phase angle of the purely resistive circuit is:





11. . Power factor of the purely resistive circuit is:





12. . Current lags with voltage in a purely inductive circuit:





13. . Phase angle between V & I in a purely inductive circuit:





14. . In the purely inductive circuit, current _______ with voltage:





15. . In the purely inductive circuit, the formula to find the power is:





16. . Power consumed in the purely inductive circuit is:





17. . The unit of XL is:





18. . Formula to determine the current in a purely inductive circuit is:





19. . Formula to determine voltage in the purely inductive circuit is:





20. . In the pure capacitive circuit, the current & voltage are:





21. . Current ______ with voltage in the pure capacitive circuit:





22. . The power factor of a purely capacitive circuit is:





23. . In the capacitive circuit, with increasing the frequency, XC is:





24. . In the capacitive circuit, the formula for XC is:





25. . The unit of XC is:





26. . In the RL series circuit, current & voltage are:





27. . In the RL series circuit, the actual component of voltage is:





28. . In the RC series circuit, current & voltage are:





29. . In a series RLC circuit, phase difference between the current in capacitor & resistor is:





30. . In a series RLC circuit, phase difference between the current in inductor & resistor is:





31. . In a series RLC circuit, phase difference between the current in the circuit & voltage across resistor is:





32. . In a series RLC circuit, phase difference between the current & voltage across capacitor is:





33. . Voltage across capacitor & inductor are:





34. . Method to solve RLC parallel circuit:





35. . Above the resonant frequency, current in inductor ______ voltage in series RLC:





36. . In RLC circuit, when XL = XC then it is called:





37. . As XL = XC in series resonance, impedance is:





38. . In parallel resonance, circuit impedance is:





39. . Resonant circuit contains ______ elements:





40. . Series RLC above resonance, current:





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