MCQOPTIONS
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MCQOPTIONS
This section includes 124 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In a parallel circuit, the branch with the lowest resistance has the most current. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 52. |
When a 1.6 kΩ resistor and a 120 Ω resistor are connected in parallel, the total resistance is |
| A. | Greater than 1.6 kΩ |
| B. | Greater than 120 Ω but less than 1.6 kΩ |
| C. | Less than 120 Ω but greater than 100 Ω |
| D. | Less than 100 Ω |
| Answer» D. Less than 100 Ω | |
| 53. |
Five 100 Ω resistors are connected in parallel. If one resistor is removed, the total resistance is |
| A. | 25 Ω |
| B. | 500 Ω |
| C. | 100 Ω |
| D. | 20 Ω |
| Answer» B. 500 Ω | |
| 54. |
Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is |
| A. | 12.5 Ω |
| B. | 200 Ω |
| C. | 20 kΩ |
| D. | 50 Ω |
| Answer» D. 50 Ω | |
| 55. |
An open resistor in parallel will cause the total ___ to increase. |
| A. | voltage |
| B. | current |
| C. | resistance |
| D. | power |
| Answer» D. power | |
| 56. |
The total resistance in the given circuit is _____. |
| A. | greater than 8 k |
| B. | 58 k |
| C. | 4.8 k |
| D. | greater than 30 k |
| Answer» D. greater than 30 k | |
| 57. |
The total resistance of a parallel circuit is always greater than the largest resistor value. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 58. |
A parallel resistor's value that changes with age will cause a corresponding change in ______ . |
| A. | branch current |
| B. | branch voltage |
| C. | both branch current and branch voltage |
| D. | power supply voltage |
| Answer» B. branch voltage | |
| 59. |
If one branch shorts out in a parallel circuit, the other branches are not affected. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 60. |
Parallel circuits have only one path for current. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 61. |
If R2 opens in the given circuit, the voltage across R1 will ___. |
| A. | increase |
| B. | decrease |
| C. | equal 0 V |
| D. | remain unchanged |
| Answer» E. | |
| 62. |
A parallel circuit is sometimes called a current divider. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 63. |
Circuit analysis should reveal that the largest resistance in a parallel circuit has the ______. |
| A. | least current |
| B. | most current |
| C. | least voltage |
| D. | most voltage |
| Answer» B. most current | |
| 64. |
The total power in a parallel circuit equals the sum of the individual branch powers. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 65. |
The total resistance of like value resistors in parallel is equal to the value of the resistors multiplied by the number of resistors used. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 66. |
Current divider predicts that the most current will flow in the parallel path of the most resistance. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 67. |
The total current entering a junction may be different from the total current leaving the junction. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 68. |
The total power in the given circuit is ___. |
| A. | 4.8 mW |
| B. | 18 mW |
| C. | 7.2 mW |
| D. | 30 mW |
| Answer» E. | |
| 69. |
A circuit is parallel between two points if ___ between those two points. |
| A. | the voltage divides |
| B. | more than one current path exists |
| C. | all resistors are equal |
| D. | there is only one current path |
| Answer» C. all resistors are equal | |
| 70. |
The voltages across all components in parallel are equal. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 71. |
The total power dissipated is 4.8 watts. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 72. |
If one of the resistors opens in a parallel circuit branch, the total resistance of the circuit will decrease. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 73. |
The total resistance in a parallel circuit is always greater than the lowest-value branch resistor. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 74. |
If two equal resistors are connected in parallel, they will carry identical currents. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 75. |
Kirchhoff's current law for parallel circuits states that the: |
| A. | sum of all branch voltages equals zero |
| B. | total circuit resistance is less than the smallest branch resistor |
| C. | sum of currents into a junction is equal to the difference of all the branch currents |
| D. | sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction |
| Answer» E. | |
| 76. |
What would these meter readings indicate about the circuit in the given circuit?Meter Readings: I = 10 mA, V = 12 V |
| A. | R1 is open. |
| B. | R2 is open. |
| C. | The fuse is open. |
| D. | The circuit is operating normally. |
| Answer» E. | |
| 77. |
If a branch opens in a parallel circuit, the current in the remaining parallel paths will change. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 78. |
A parallel circuit differs from a series circuit in that a parallel circuit has |
| A. | no path for current flow |
| B. | fewer paths for current flow |
| C. | one path for current flow |
| D. | more than one path for current flow |
| Answer» E. | |
| 79. |
Kirchhoff's current law states that the current flowing into a point of a circuit is equal to the sum of the voltages in the output branches. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 80. |
What does P2 equal in the given circuit? |
| A. | 45 mW |
| B. | 405 mW |
| C. | 450 mW |
| D. | 900 mW |
| Answer» C. 450 mW | |
| 81. |
Which component is of the wrong value? |
| A. | R1 |
| B. | R2 |
| C. | R3 |
| D. | R4 |
| Answer» B. R2 | |
| 82. |
If a 1 k and a 2 k resistor are parallel-connected across a 12 V supply, how much current is received by the 2 k resistor? |
| A. | 4 mA |
| B. | 6 mA |
| C. | 8 mA |
| D. | 12 mA |
| Answer» C. 8 mA | |
| 83. |
The current through R1 will be: |
| A. | 128 mA |
| B. | 88 mA |
| C. | 48 mA |
| D. | 2.2 mA |
| Answer» D. 2.2 mA | |
| 84. |
What does RT equal in the given circuit? |
| A. | 90 |
| B. | 180 |
| C. | 200 |
| D. | 1.8 k |
| Answer» B. 180 | |
| 85. |
If two parallel-connected resistors dissipate 6 watts and 10 watts of power, then what is the total power loss? |
| A. | 3.75 watts |
| B. | 4 watts |
| C. | 16 watts |
| D. | 60 watts |
| Answer» D. 60 watts | |
| 86. |
If the voltmeter indicates 12 V in the given circuit, the voltage across R2 equals ___. |
| A. | 12 V |
| B. | VS minus 12 V |
| C. | 0 V |
| D. | More information is needed to find the voltage across R2. |
| Answer» B. VS minus 12 V | |
| 87. |
Which component is shorted? |
| A. | R1 |
| B. | R2 |
| C. | R3 |
| D. | R4 |
| Answer» E. | |
| 88. |
In a parallel resistive circuit: |
| A. | there is more than one current path between two points |
| B. | the voltage applied divides between the branches |
| C. | the total branch power exceeds the source power |
| D. | the total circuit conductance is less than the smallest branch conductance |
| Answer» B. the voltage applied divides between the branches | |
| 89. |
In the given circuit, Channel 1 of the stereo amplifier outputs 12 V to the speakers. How much total current is the amplifier providing to the speakers? |
| A. | 0 |
| B. | 1.5 A |
| C. | 0.125 |
| D. | More information is needed to find the total current provided to the speakers. |
| Answer» D. More information is needed to find the total current provided to the speakers. | |
| 90. |
If R1 opens in the given circuit, the total current equals ___. |
| A. | 86 mA |
| B. | 170 mA |
| C. | 42 mA |
| D. | 128 mA |
| Answer» E. | |
| 91. |
Which are the better test devices used to isolate a suspected open component within a parallel circuit? |
| A. | a voltmeter or an ohmmeter |
| B. | neither an ammeter nor a voltmeter |
| C. | a wattmeter or a voltmeter |
| D. | an ammeter or an ohmmeter |
| Answer» E. | |
| 92. |
What are the individual values of two parallel resistors whose RT is 8 ohms, when one has double the resistance of the other? |
| A. | 2.7 ohms and 5.3 ohms |
| B. | 8 ohms and 16 ohms |
| C. | 10 ohms and 20 ohms |
| D. | 12 ohms and 24 ohms |
| Answer» E. | |
| 93. |
What is the total power of the circuit? |
| A. | 2.2 W |
| B. | 4.2 W |
| C. | 6.2 W |
| D. | 8.2 W |
| Answer» C. 6.2 W | |
| 94. |
The largest branch resistance in a parallel circuit carries the largest branch current. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 95. |
The total resistance is 480 . |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 96. |
What is RT for fifteen 2 M resistors all connected in parallel? |
| A. | 133 k |
| B. | 300 k |
| C. | 750 k |
| D. | 30 M |
| Answer» B. 300 k | |
| 97. |
Which component is open? |
| A. | R1 |
| B. | R2 |
| C. | R3 |
| D. | R4 |
| Answer» D. R4 | |
| 98. |
In the given circuit, Channel 1 of the stereo amplifier outputs 12 V to the speakers. How much total power is the amplifier delivering to the speakers? |
| A. | 0 W |
| B. | 18 W |
| C. | 36 W |
| D. | More information is needed to find the total power delivered to the speakers. |
| Answer» D. More information is needed to find the total power delivered to the speakers. | |
| 99. |
An ammeter is connected in ______ with the branch resistor to measure branch current, and in ______ with the voltage supply to measure total parallel circuit current. |
| A. | parallel, series |
| B. | series, parallel |
| C. | series, series |
| D. | parallel, parallel |
| Answer» D. parallel, parallel | |
| 100. |
If 550 mA of current leaves a node that had 250 mA entering from one branch, how much current would enter from the other? |
| A. | 250 mA |
| B. | 300 mA |
| C. | 550 mA |
| D. | 800 mA |
| Answer» C. 550 mA | |