Electrical engineering MCQ Quiz Hub

Network Theory Set-3

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1. The Superposition Theorem is not applicable for _________




2. In superposition theorem when we consider one voltage source, all the other voltage sources are ___________




3. In Reciprocity Theorem, which of the following ratios is considered?




4. The Reciprocity Theorem is valid for ___________




5. The Reciprocity Theorem is applicable for __________




6. The temperature coefficient of a metal as the temperature increases will ____________




7. Given a wire of resistance R Ω. The resistance of a wire of the same material and same weight and double the diameter is ___________




8. The star equivalent resistance of 3 resistors having each resistance = 5 Ω is ____________




9. The charge associated with a bulb rated as 20 W, 200 V and used for 10 minutes is ____________




10. For a series RL circuit having L = 5 H, current = 1 A (at an instant). The energy stored in magnetic field is ___________




11. For a practical voltage source, which of the following is correct?




12. Consider an electric motor having resistance of 10 Ω, 20 Ω and 30 Ω respectively. The percentage of energy dissipated by 10 Ω earthing plate is ____________




13. Consider a resistive network circuit, having 3 sources of 18 W, 50 W and 98 W respectively and a resistance R. When all source act together the maximum and minimum power is ____________




14. A current waveform is of the shape of a right angled triangle with period of t = 1 sec. Given a resistance R = 1 Ω. The average power is __________




15. Given two mutually coupled coils have a total inductance of 1500 mH, the self-inductance of each coils if the coefficient of coupling is 0.2 is ____________




16. For a series RL circuit, the impedance Z = 10 Ω at a frequency of 50 Hz. At 100 Hz the impedance is ___________




17. Consider the self-inductances of two coils as 12 H and 5 H. 50 % of one flux links the other. The mutual inductance is ___________




18. A network contains linear resistors and ideal voltage source s. If values of all the resistors are doubled, then voltage across each resistor is __________




19. The linear circuit element among the following is ___________




20. A particular electric current is made up of two component: a 10 A and a sine wave of peak value 14.14 A. The average value of electric current is __________




21. Among the following, the active element of electrical circuit is ____________




22. The basic elements of an electric circuit are _____________




23. The energy stored in the magnetic field at a solenoid 100 cm long and 10 cm diameter wound with 1000 turns of wire carrying an electric current of 10 A, is ___________




24. The two windings of a transformer have an inductor of 2 H each. If mutual inductor between them is also 2 H, then which of the following is correct?




25. The form factor of sinusoidal alternating electric current is ___________




26. The rms value of the sine wave is 100 A. Its peak value is ____________




27. Potential of earth is – 50 V. If the potential difference between anode and cathode (earthed) is measured as 150 V, actual voltage on anode is __________




28. An alternating voltage V = 150 sin(314)t is supplied to a device which offers a resistance of 20 Ω in forward direction of electric current while preventing the flow of electric current in reverse direction. The form factor is ___________




29. A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductor of the coil corresponding to a magnetizing electric current of 3 A will be?




30. Impedance is a complex quantity having the real part as _______ and the imaginary part as ______




31. If we apply a sinusoidal input to RL circuit, the current in the circuit is __________ and the voltage across the elements is _______________




32. In purely resistive circuit, energy delivered by source is ____________ by resistance.




33. In inductor, the energy delivered by source is ____________ by inductor.




34. In capacitor, the energy delivered by source is ____________ by capacitor.




35. If there is complex impedance in a circuit, part of energy is ____________ by reactive part and part of its energy is ____________ by the resistance.




36. The time varying part in the equation of instantaneous power has frequency ________________ that of the frequency of voltage or current wave forms.




37. Instantaneous power is negative, when the polarities of voltage and current are of __________




38. At θ=π/2, positive portion is __________ negative portion in power cycle.




39. If a circuit has complex impedance, the average power is ______




40. The highest power factor will be?




41. In case of resistive load, what is the power factor?




42. For reactive load, the power factor is equal to?




43. Average power is also called?




44. If we apply a sinusoidal voltage to a circuit, the product of voltage and current is?




45. The power factor=?




46. The power factor is the ratio of ________ power to the ______ power.




47. The power factor is called leading power factor in case of ____ circuits.




48. The term lagging power factor is used in which circuits?




49. Reactive power is expressed in?




50. If there are M branch currents, then we can write ___________ number of independent equations.