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

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
2. A.130 W
3. B.125 W
4. C.120 W
5. D.200 W

1 points  

QUESTION 2

1. Which statement best describes the reactance in a series RLC circuit?
2. A.Resistance is always dominant
3. B.The larger of the two reactances is dominant
4. C.Inductive reactance is always dominant
5. D.Capacitive reactance is always dominant

1 points  

QUESTION 3

1. At resonant frequency, what voltage is measured across two series reactive components?
2. A.applied
3. B.inductive and capacitive
4. C.reactive
5. D.zero

1 points  

QUESTION 4

1. In a circuit, true power is 800 watts and apparent power is 1000 VAR. What is the power factor?
2. A.0.6
3. B.1.25
4. C.0.8
5. D.0.85

1 points  

QUESTION 5

1. Q factor of the circuit is _______ to the power factor of the circuit.
2. A.Inverse to 
3. B.Equal to 
4. C.Greater than
5. D.Not related

1 points  

QUESTION 6

1. Which of the following device has poor or low power factor?
2. A.Computers
3. B.Synchronous Motor
4. C.Electric Furnace
5. D.Filament Bulb

1 points  

QUESTION 7

1. Power factor nearer to Zero is considered to be a good power factor.
2.  True
3.  False

1 points  

QUESTION 8

1. Inductors motors generally operate with leading power factor.
2.  True
3.  False

1 points  

QUESTION 9

1. Admittance is the reciprocal of ________
2. A.Reactance
3. B.Susceptance
4. C.Conductance
5. D.Impedance

1 points  

QUESTION 10

1. Find the power factor for the circuit where X_L = 200 Ω and Z = 350 Ω. Write 2 digits after decimal point.

2 points  

QUESTION 11

1. 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

1. 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. 
2.  
3. Attach File
4.  

4 points  

QUESTION 13

1. Calculate V_R, V_C, I_T, Z, Power and Power factor for the circuit.
2. R= 2.2 kΩ, X_C = 1 kΩ, f = 60 Hz and V_S = 10∠0⁰  V. Voltage is in RMS. Find the current in RMS.
3.  
4.  
5. Attach File
6.  

6 points  

QUESTION 14

1. For RLC series circuit, R = 50 Ω, X_L = 25 Ω. Determine the capacitive reactance at resonance. Write the value only, not the unit.

1 points  

QUESTION 15

1. Determine the value of Z for the data in Q:14.

1 points  

QUESTION 16

1. 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

1. If the bandwidth of a circuit is narrow, the selectivity is high.
2.  True
3.  False

1 points  

QUESTION 18

1. Below resonant frequency fr, series RLC circuit behaves as a predominantly capacitive circuit.
2.  True
3.  False

1 points  

QUESTION 19

1. The lower cut off and upper cut off frequency are 7 kHz and 12 kHz. What is the bandwidth of the circuit?
2. A.19 kHz
3. B.9.5 kHz
4. C.5 kHz
5. D.4.5 kHz