MCQOPTIONS
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MCQOPTIONS
This section includes 111 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
When resistors burn out, they usually short. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 52. |
___ is often used to analyze multiple-source circuits. |
| A. | Thevenin's theorem |
| B. | Superposition |
| C. | Kirchhoff's law |
| D. | Ohm's law |
| Answer» C. Kirchhoff's law | |
| 53. |
R2 is open. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 54. |
Observed voltages not being shared identify components in parallel in a series–parallel circuit. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 55. |
The current through R1 is 17 mA. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 56. |
The power dissipated by R4 is 211 mW. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 57. |
When a load is connected to a voltage divider, the total resistance of the circuit will ________. |
| A. | increase |
| B. | decrease |
| C. | remain the same |
| D. | double |
| Answer» C. remain the same | |
| 58. |
A loaded voltage divider is a common application of a series-parallel circuit. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 59. |
When a load resistance is connected to the output of a voltage divider circuit, the source current increases. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 60. |
If a Wheatstone bridge is balanced, its output voltage is ____. |
| A. | the same as its input voltage |
| B. | very high |
| C. | dependent on the unknown resistor value |
| D. | equal to 0 V |
| Answer» E. | |
| 61. |
If the Wheatstone bridge is balanced in the given circuit, the voltage between points A and B (VAB) equals the source voltage (VS). |
| A. | 1 |
| B. | |
| Answer» C. | |
| 62. |
The current through R6 is 8.5 mA. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 63. |
If R1 is in series with a parallel combination of R2, R3, and R4, when the resistance value of R2 increases, the voltage across R3 will |
| A. | increase |
| B. | decrease |
| C. | remain the same |
| D. | Cannot tell |
| Answer» B. decrease | |
| 64. |
If the load in the given circuit is open, what is the unloaded output voltage? |
| A. | 0 V |
| B. | 4 V |
| C. | 16 V |
| D. | 20 V |
| Answer» D. 20 V | |
| 65. |
If the load in the given circuit is 12 k , what is the loaded output voltage? |
| A. | 5.88 V |
| B. | 14.12 V |
| C. | 16 V |
| D. | 17.14 V |
| Answer» C. 16 V | |
| 66. |
How much voltage is dropped across R3 in the given circuit? |
| A. | 46 V |
| B. | 34 V |
| C. | 23 V |
| D. | 12 V |
| Answer» E. | |
| 67. |
What is the power dissipated by R1, R2, and R3? |
| A. | P1 = 0.13 W, P2 = 0.26 W, P3 = 0.12 W |
| B. | P1 = 0.26 W, P2 = 0.52 W, P3 = 0.23 W |
| C. | P1 = 0.52 W, P2 = 0.92 W, P3 = 0.46 W |
| D. | P1 = 1.04 W, P2 = 1.84 W, P3 = 0.92 W |
| Answer» C. P1 = 0.52 W, P2 = 0.92 W, P3 = 0.46 W | |
| 68. |
If four 10 k resistors are in series with a single 20 k resistor and one of the parallel resistors shorts, the voltage across the other parallel resistors ________. |
| A. | increases |
| B. | decreases |
| C. | remains the same |
| D. | drops to zero |
| Answer» C. remains the same | |
| 69. |
A Wheatstone bridge can be used to determine an unknown |
| A. | current |
| B. | resistance |
| C. | power |
| D. | voltage |
| Answer» C. power | |
| 70. |
The voltage out when a 10 k load is connected is 5.7 volts. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 71. |
If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3? |
| A. | 10 ohms |
| B. | 20 ohms |
| C. | 45 ohms |
| D. | 90 ohms |
| Answer» D. 90 ohms | |
| 72. |
In the given circuit, the total resistance (RT) between points A and B equals _____. |
| A. | 10 |
| B. | 100 |
| C. | 900 |
| D. | 1010 |
| Answer» C. 900 | |
| 73. |
The voltage across R1 is 175 volts. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 74. |
In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2's voltage will: |
| A. | increase |
| B. | decrease |
| C. | remain the same |
| D. | cannot tell |
| Answer» C. remain the same | |
| 75. |
How much current is flowing through R1 in the given circuit? |
| A. | 0.3 A |
| B. | 0.15 A |
| C. | 0.5 A |
| D. | 0.68 A |
| Answer» D. 0.68 A | |
| 76. |
What are the branch currents I2 and I3? |
| A. | I2 = 4 mA, I3 = 2 mA |
| B. | I2 = 4.5 mA, I3 = 2.5 mA |
| C. | I2 = 2.5 mA, I3 = 1.5 mA |
| D. | I2 = 5.5 mA, I3 = 3.5 mA |
| Answer» D. I2 = 5.5 mA, I3 = 3.5 mA | |
| 77. |
A Thevenin equivalent circuit contains _____. |
| A. | a voltage source in series with a resistance |
| B. | a current source in series with a resistance |
| C. | resistors in a series-parallel configuration |
| D. | many voltage sources |
| Answer» B. a current source in series with a resistance | |
| 78. |
Series components in a series–parallel circuit may be in series with other _______________ components, or with other _______________ components. |
| A. | individual, combinations of |
| B. | series, parallel |
| C. | parallel, series |
| D. | shunt, parallel |
| Answer» B. series, parallel | |
| 79. |
The total power is 10 watts. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 80. |
The first goal(s) to accomplish in analyzing a complex series–parallel circuit is to: |
| A. | equate all parallel components |
| B. | equate all series components |
| C. | solve for all the voltage drops |
| D. | solve for the total current and resistance |
| Answer» E. | |
| 81. |
What determines if resistor connections are in series, parallel, or series–parallel? |
| A. | the voltage source |
| B. | the power source |
| C. | resistance |
| D. | current flow |
| Answer» E. | |
| 82. |
In the given circuit, the voltage dropped across R1 equals _____. |
| A. | 1 V |
| B. | 9 V |
| C. | 10 V |
| D. | 19 V |
| Answer» C. 10 V | |
| 83. |
With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3? |
| A. | 200 mA |
| B. | 800 mA |
| C. | 600 mA |
| D. | 400 mA |
| Answer» E. | |
| 84. |
In the given circuit, the current flowing through R3 equals ______. |
| A. | 10 mA |
| B. | 21.11 mA |
| C. | 90 mA |
| D. | 100 mA |
| Answer» B. 21.11 mA | |
| 85. |
If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens? |
| A. | increases |
| B. | decreases |
| C. | remains the same |
| D. | cannot tell |
| Answer» C. remains the same | |
| 86. |
What is the voltage to the load? |
| A. | 11.4 V |
| B. | 12.4 V |
| C. | 13.4 V |
| D. | 15.4 V |
| Answer» E. | |
| 87. |
In the given circuit, the Thevenin resistance equals 800 . |
| A. | 1 |
| B. | |
| Answer» C. | |
| 88. |
If the output voltage of a certain loaded voltage divider is 12 V, the output voltage might decrease when the load is removed. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 89. |
With 6 V applied, what is the voltage across R2 of a parallel combination of R2 (1 k ), R3 (2 k ), and R4 (1 k ) in series with R1, whose value is 2 k ? |
| A. | 1 V |
| B. | 3 V |
| C. | 5 V |
| D. | 6 V |
| Answer» B. 3 V | |
| 90. |
If a Wheatstone bridge is balanced, a voltmeter in the center of the bridge will read: |
| A. | the same as the source voltage |
| B. | half the source voltage |
| C. | zero volts |
| D. | twice the source voltage |
| Answer» D. twice the source voltage | |
| 91. |
If the load in the given circuit is 80 k , what is the bleeder current? |
| A. | 196 A |
| B. | 1.96 mA |
| C. | 2 mA |
| D. | 2.16 mA |
| Answer» C. 2 mA | |
| 92. |
What is the total resistance? |
| A. | 2.2 k |
| B. | 3.2 k |
| C. | 4.2 k |
| D. | 5.2 k |
| Answer» C. 4.2 k | |
| 93. |
The voltmeter will read 18 volts. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 94. |
In the given circuit, what is RUNK equal to if RV must be adjusted to 1,232 in order to balance the bridge? |
| A. | 220 |
| B. | 6899 |
| C. | 1232 |
| D. | More information is needed in order to find RUNK. |
| Answer» B. 6899 | |
| 95. |
Bleeder current is the total current left after the total divider current is subtracted from the total current into the circuit. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 96. |
The first goal to accomplish in analyzing a complex series-parallel circuit is to |
| A. | equate all parallel components |
| B. | equate all series components |
| C. | solve for all the voltage drops |
| D. | solve for the total current and resistance |
| Answer» E. | |
| 97. |
The voltage across R3 is 20 volts. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 98. |
What is the total resistance of a circuit when R1 (7 k ) is in series with a parallel combination of R2 (20 k ), R3 (36 k ), and R4 (45 k )? |
| A. | 4 k |
| B. | 17 k |
| C. | 41 k |
| D. | 108 k |
| Answer» C. 41 k | |
| 99. |
When a load is connected to a voltage divider, the total resistance of the circuit will: |
| A. | decrease |
| B. | double |
| C. | increase |
| D. | remain the same |
| Answer» B. double | |
| 100. |
What is the total resistance of the given circuit? |
| A. | 92 |
| B. | 288 |
| C. | 17.7 |
| D. | 128 |
| Answer» B. 288 | |