Q1. | The ratio of the bandwidth to the resonance frequency is called the____ of the circuit. |

A. | Impedance [Wrong Answer] |

B. | Susceptance [Wrong Answer] |

C. | Quality factor [Wrong Answer] |

D. | Selectivity [Correct Answer] |

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Explanation:-
Answer : DDiscuss it below :Victor Ofori-Danquah Said on 2020-09-27 13:39:571. In each of the three coils of a three-phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters? A. 220 V B. 220 √3 V C. 220/√3 V D. None of the above 2. In a highly capacitive circuit the A. Apparent power is equal to the actual power B. Reactive power is more than the apparent power C. Reactive power is more than the actual power D. Actual power is more than its reactive power 3. In a R-L-C circuit A. Power is consumed in resistance B. Exchange of power takes place between inductor and supply line C. Exchange of power takes place between capacitor and supply line D. All above are correct 4. Which of the following statements pertains to resistors only? A. Can dissipate considerable amount of power B. Can act as energy storage devices C. Connecting them in parallel increases the total value D. Oppose sudden changes in voltage 5. The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that A. Both waves must have same frequency B. Both waves must have identical peak values C. Both waves must have zero value at the same time D. None of the above 6. When an alternating current passes through an ohmic resistance the electrical power converted into heat is A. Apparent power B. True power C. Reactive power D. None of the above 7. In a purely inductive circuit A. Actual power is zero B. Reactive power is zero C. Apparent power is zero D. None of above is zero 8. The r.m.s. value of pure cosine function is A. 0.5 of peak value B. 0.707 of peak value C. Same as peak value D. Zero 9. In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will A. Be reduced by half B. Be doubled C. Be four times at high D. Be reduced to one fourth 10. Ohm is unit of all of the following except A. Inductive reactance B. Capacitive reactance C. Resistance D. Capacitance 11. All the rules and laws of D.C. circuit also apply to A.C. circuit containing A. Capacitance only B. Inductance only C. Resistance only D. All above 12. In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of A. R only B. L only C. C only D. L or C 13. In an A.C. circuit power is dissipated in A. Resistance only B. Inductance only C. Capacitance only D. None of the above 14. The voltage of domestic supply is 220 V. This figure represents A. Mean value B. r.m.s. value C. Peak value D. Average value 15. The transient currents are associated with the A. Changes in the stored energy in the inductors and capacitors B. Impedance of the circuit C. Applied voltage to the circuit D. Resistance of the circuit 16. A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to A. The capacitive reactance in ohms B. The current flowing in capacitor C. The size of the capacitor being quite big D. The statement is incorrect 17. Inductance of coil A. Is unaffected by the supply frequency B. Decreases with the increase in supply frequency C. Increases with the increase in supply frequency D. Becomes zero with the increase in supply frequency 18. At very low frequencies a series R-C circuit behaves as almost purely A. Resistive B. Inductive C. Capacitive D. None of the above 19. For which of the following pair are 180° out of phase for VL, VC and VR? A. VC and VR B. VL and VR C. VC and VL D. None of the above 20. The period of a sine wave is 0.02 seconds. Its frequency is A. 20 Hz B. 30 Hz C. 40 Hz D. 50 Hz 21. In a series L-C circuit at the resonant frequency the A. Current is maximum B. Current is minimum C. Impedance is maximum D. Voltage across C is minimum 22. A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to A. The big size of the inductor B. The reactance of the inductor C. The current flowing in the inductor D. The statement given is false 23. Inductance affects the direct current flow A. Only at the time of turning off B. Only at the time of turning on C. At the time of turning on and off D. At all the time of operation 24. If a sinusoidal wave has frequency of 50Hz with 30A r.m.s. current which of the following equation represents this wave? A. 42.42 sin 314 t B. 60 sin 25 t C. 30 sin 50 t D. 84.84 sin 25 t 25. Conventional current has A. positive charge B. negative charge C. neutron D. any particle 26.The instantaneous amplitude of an ac wave is A. the amplitude as measured or defined at some specific moment in time. B. the amplitude averaged over any exact whole number of wave cycles. C. equal to approximately 0.707 times the peak amplitude. D. equal to approximately 1.414 times the peak amplitude. 27.Suppose that you read in a technical paper that two particular sine waves have different frequencies but are in phase coincidence. You conclude that A. the phase angle is 0°. B. the phase angle is 180°. C. the phase angle is +90°. D. the paper contains a mistake.
28.The angular frequency of a certain ac wave is 450 rad/s. What is the frequency in kilohertz? A. 0.716 kHz B. 0.450 kHz C. 0.0716 kHz D. 71.6 kHz 29.When two waves having identical frequencies are in phase opposition, they are displaced by approximately A. 0.785 radians. B. 1.57 radians. C. 3.14 radians. D. 6.28 radians. 30. A purely resistive impedance is also said to be A. nonconductive. B. noncapacitive. C. noninductive. D. nonreactive. !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

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