#### QUESTION 1 If the resistance of an electric bulb is 500 Ω and voltage across its ends is 250 V then power consumed by it is A

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# QUESTION 1 If the resistance of an electric bulb is 500 Ω and voltage across its ends is 250 V then power consumed by it is A.130 W B.125 W C.120 W D.200 W 1 points  QUESTION 2 Which statement best describes the reactance in a series RLC circuit? A.Resistance is always dominant B.The larger of the two reactances is dominant C.Inductive reactance is always dominant D.Capacitive reactance is always dominant 1 points  QUESTION 3 At resonant frequency, what voltage is measured across two series reactive components? A.applied B.inductive and capacitive C.reactive D.zero 1 points  QUESTION 4 In a circuit, true power is 800 watts and apparent power is 1000 VAR. What is the power factor? A.0.6 B.1.25 C.0.8 D.0.85 1 points  QUESTION 5 Q factor of the circuit is _______ to the power factor of the circuit. A.Inverse to  B.Equal to  C.Greater than D.Not related 1 points  QUESTION 6 Which of the following device has poor or low power factor? A.Computers B.Synchronous Motor C.Electric Furnace D.Filament Bulb 1 points  QUESTION 7 Power factor nearer to Zero is considered to be a good power factor.  True  False 1 points  QUESTION 8 Inductors motors generally operate with leading power factor.  True  False 1 points  QUESTION 9 Admittance is the reciprocal of ________ A.Reactance B.Susceptance C.Conductance D.Impedance 1 points  QUESTION 10 Find the power factor for the circuit where XL = 200 Ω and Z = 350 Ω. Write 2 digits after decimal point. 2 points  QUESTION 11 Find the capacitance (in µF)that has a reactive power of 50 var when connected across a 120 V 60 Hz source. 2 points  QUESTION 12 Determine the total RMS current, active power and power factor of the circuit. R = 560 Ω, XL = 1 kΩ, XC = 1 kΩ. Vs = 20 ∠00 V. Voltage is in RMS.    Attach File   4 points  QUESTION 13 Calculate VR, VC, IT, Z, Power and Power factor for the circuit. R= 2.2 kΩ, XC = 1 kΩ, f = 60 Hz and VS = 10∠00  V. Voltage is in RMS. Find the current in RMS.     Attach File   6 points  QUESTION 14 For RLC series circuit, R = 50 Ω, XL = 25 Ω. Determine the capacitive reactance at resonance. Write the value only, not the unit. 1 points  QUESTION 15 Determine the value of Z for the data in Q:14. 1 points  QUESTION 16 Determine the resonant frequency in kHz for RLC series circuit. R = 10 Ω, L=0.5 mH and C= 10 μF. Use two digits after decimal point. 2 points  QUESTION 17 If the bandwidth of a circuit is narrow, the selectivity is high.  True  False 1 points  QUESTION 18 Below resonant frequency fr, series RLC circuit behaves as a predominantly capacitive circuit.  True  False 1 points  QUESTION 19 The lower cut off and upper cut off frequency are 7 kHz and 12 kHz. What is the bandwidth of the circuit? A.19 kHz B.9.5 kHz C.5 kHz D.4.5 kHz

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