MCQOPTIONS
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MCQOPTIONS
This section includes 136 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
What is the current phase angle for a parallel RLC circuit when IL = 15.3 A, IC = 0.43 A, and IR = 3.5 A? |
| A. | 76.7 degrees |
| B. | –4.25 degrees |
| C. | 88.8 degrees |
| D. | –76.7 degrees |
| Answer» E. | |
| 102. |
The phase angle is ______ in the given circuit. |
| A. | 27.6° |
| B. | 62.4° |
| C. | 74.1° |
| D. | 76.1° |
| Answer» B. 62.4¬∞ | |
| 103. |
The output voltage at the resonant frequency is ______ in the given circuit. If a 10 k load is connected. |
| A. | 553 mV |
| B. | 5.65 V |
| C. | 6.01 V |
| D. | 6.5 V |
| Answer» C. 6.01 V | |
| 104. |
The current through the inductor is 5 amps. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 105. |
What is the high cutoff frequency for an RLC circuit that resonates at 2000 Hz and has a bandwidth of 250 Hz? |
| A. | 2125 Hz |
| B. | 2250 Hz |
| C. | 1750 Hz |
| D. | 8.0 Hz |
| Answer» B. 2250 Hz | |
| 106. |
Voltage lags current in an RLC circuit when it acts: |
| A. | capacitively |
| B. | resistively |
| C. | inductively |
| D. | resonantly |
| Answer» B. resistively | |
| 107. |
How much current will flow in a series RLC circuit when VT = 100 V, XL = 160 , XC = 80 , and R = 60 ? |
| A. | 0.041666666666667 |
| B. | 1 mA |
| C. | 6.28 A |
| D. | 0.41666666666667 |
| Answer» B. 1 mA | |
| 108. |
What is the total current? |
| A. | 15.6 mA |
| B. | 17.8 mA |
| C. | 21.9 mA |
| D. | 26.0 mA |
| Answer» B. 17.8 mA | |
| 109. |
Which statement best describes reactance in a series RLC circuit? |
| A. | Capacitive reactance is always dominant. |
| B. | Inductive reactance is always dominant. |
| C. | Resistance is always dominant. |
| D. | The larger of the two reactances is dominant. |
| Answer» E. | |
| 110. |
What is the band pass (F1 – F2) of an RLC filter that resonates at 150 kHz and has a coil Q of 30? |
| A. | 100.0 kHz to 155.0 kHz |
| B. | 147.5 kHz to 152.5 kHz |
| C. | 295.5 kHz to 4500 kHz |
| D. | 149,970 Hz to 150,030 Hz |
| Answer» C. 295.5 kHz to 4500 kHz | |
| 111. |
What is the approximate phase angle in a series RLC circuit when VC = 117 V, VR = 14.5 V, and VL = 3.3 V? |
| A. | –45.0 degrees |
| B. | –82.7 degrees |
| C. | –90.0 degrees |
| D. | –172.7 degrees |
| Answer» C. ‚Äì90.0 degrees | |
| 112. |
In a series RLC circuit, at above resonance the circuit is more capacitive than it is inductive. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 113. |
If the bandwidth of a filter increases: |
| A. | Q decreases |
| B. | the roll-off rate increases |
| C. | the half-power frequency decreases |
| D. | the center frequency decreases |
| Answer» B. the roll-off rate increases | |
| 114. |
What is the impedance of the circuit in the given circuit? |
| A. | 1.05 k |
| B. | 1.33 k |
| C. | 2.19 k |
| D. | 3.39 k |
| Answer» B. 1.33 k | |
| 115. |
At resonance, the term bandwidth includes all frequencies that allow what percentage of maximum current to flow? |
| A. | 50 |
| B. | 62.3 |
| C. | 70.7 |
| D. | 95.3 |
| Answer» D. 95.3 | |
| 116. |
Series RLC voltage or impedance totals must be calculated by: |
| A. | subtracting the values |
| B. | graphing the angles |
| C. | adding vectors |
| D. | multiplying the values |
| Answer» D. multiplying the values | |
| 117. |
Series RLC impedance or voltage totals must always be calculated by |
| A. | adding values vectorially |
| B. | graphing the angles |
| C. | multiplying the values |
| D. | subtracting the values |
| Answer» B. graphing the angles | |
| 118. |
What is the impedance of the circuit? |
| A. | 12.2 k |
| B. | 14.5 k |
| C. | 17.8 k |
| D. | 20.3 k |
| Answer» E. | |
| 119. |
Resonance will occur when XC = XL in the circuit below. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 120. |
What effect will a parallel tank have upon final filter current? |
| A. | very little |
| B. | The bandpass frequencies will change. |
| C. | The frequency cutoff will change. |
| D. | The impedance will block output. |
| Answer» B. The bandpass frequencies will change. | |
| 121. |
What is the phase angle? |
| A. | 61.4º |
| B. | 28.5º |
| C. | -28.5º |
| D. | -61.4º |
| Answer» D. -61.4¬∫ | |
| 122. |
What is the bandwidth of the circuit? |
| A. | 31.8 Hz |
| B. | 32.3 Hz |
| C. | 142 Hz |
| D. | 7.2 kHz |
| Answer» B. 32.3 Hz | |
| 123. |
What is the Q (Quality factor) of a series circuit that resonates at 6 kHz, has equal reactance of 4 kilo-ohms each, and a resistor value of 50 ohms? |
| A. | 0.001 |
| B. | 50 |
| C. | 80 |
| D. | 4 |
| Answer» D. 4 | |
| 124. |
What is the voltage across R1, C1, and L1? |
| A. | VR = 156 V, VC = 165 V, VL = 441 V |
| B. | VR = 178 V, VC = 187 V, VL = 503 V |
| C. | VR = 219 V, VC = 232 V, VL = 619 V |
| D. | VR = 260 V, VC = 276 V, VL = 735 V |
| Answer» B. VR = 178 V, VC = 187 V, VL = 503 V | |
| 125. |
What is the resonant frequency in the given circuit? |
| A. | 11.6 Hz |
| B. | 275.8 Hz |
| C. | 1.5 kHz |
| D. | 3.2 kHz |
| Answer» E. | |
| 126. |
In a parallel RLC circuit, which value may always be used as a vector reference? |
| A. | current |
| B. | reactance |
| C. | resistance |
| D. | voltage |
| Answer» E. | |
| 127. |
With the frequency given, the circuit in the given circuit is operating above resonance. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 128. |
What is the total impedance of a 60 Hz series RLC circuit when XL = 7.5 ohms, XC = 265.3 ohms, and R = 33 ohms? |
| A. | 257.8 ohms |
| B. | 259.9 ohms |
| C. | 290.8 ohms |
| D. | 1989.75 ohms |
| Answer» C. 290.8 ohms | |
| 129. |
How much current will flow in a 100 Hz series RLC circuit if VS = 20 V, RT = 66 ohms, and XT = 47 ohms? |
| A. | 1.05 A |
| B. | 303 mA |
| C. | 247 mA |
| D. | 107 mA |
| Answer» D. 107 mA | |
| 130. |
What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30? |
| A. | 100.0 kHz to 155.0 kHz |
| B. | 147.5 kHz to 152.5 kHz |
| C. | 4500 kHz to 295.5 kHz |
| D. | 149,970 Hz to 150,030 Hz |
| Answer» C. 4500 kHz to 295.5 kHz | |
| 131. |
What is the bandwidth in the given circuit. If the winding resistance of the coil is 12 ? |
| A. | 6.4 kHz |
| B. | 47.2 kHz |
| C. | 53.7 kHz |
| D. | 60.2 kHz |
| Answer» B. 47.2 kHz | |
| 132. |
What is the true power consumed in a 30 V series RLC circuit if Z = 20 ohms and R = 10 ohms? |
| A. | 15.0 watts |
| B. | 22.5 watts |
| C. | 30.0 watts |
| D. | 45.0 watts |
| Answer» C. 30.0 watts | |
| 133. |
What is the power factor? |
| A. | 0.279 |
| B. | 0.479 |
| C. | 0.679 |
| D. | 0.879 |
| Answer» E. | |
| 134. |
When a parallel tank is used in series with an output load resistor the filter is a(n) ______ filter. |
| A. | band-stop |
| B. | low-pass |
| C. | bandpass |
| D. | high-pass |
| Answer» B. low-pass | |
| 135. |
When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a: |
| A. | low-pass filter |
| B. | high-pass filter |
| C. | band-stop filter |
| D. | bandpass filter |
| Answer» E. | |
| 136. |
What is the applied voltage for a series RLC circuit when IT = 3 mA, VL = 30 V, VC = 18 V, and R = 1000 ohms? |
| A. | 3.00 V |
| B. | 12.37 V |
| C. | 34.98 V |
| D. | 48.00 V |
| Answer» C. 34.98 V | |