question archive 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 X
_{L}= 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 ∠0
^{0 }V. Voltage is in RMS. - Attach File

**4 points **

**QUESTION 13**

- Calculate V
_{R}, V_{C}, I_{T}, Z, Power and Power factor for the circuit. - R= 2.2 kΩ, X
_{C }= 1 kΩ, f = 60 Hz and V_{S}= 10∠0^{0 }V. Voltage is in RMS. Find the current in RMS. - Attach File

**6 points **

**QUESTION 14**

- 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**

- 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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