MCQOPTIONS
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MCQOPTIONS
This section includes 553 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
An inductor, a 1 k resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is |
| A. | 0 V |
| B. | 6 V |
| C. | 12 V |
| D. | 4 V |
| Answer» C. 12 V | |
| 52. |
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current |
| A. | is increased |
| B. | is decreased |
| C. | does not change |
| D. | momentarily goes to zero |
| Answer» B. is decreased | |
| 53. |
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is |
| A. | good |
| B. | open |
| C. | shorted |
| D. | partly shorted |
| Answer» D. partly shorted | |
| 54. |
A 240 H inductor is equivalent to a |
| A. | 0.240 mH inductor |
| B. | 0.000240 mH inductor |
| C. | 240 mH inductor |
| D. | 240 H inductor |
| Answer» B. 0.000240 mH inductor | |
| 55. |
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is |
| A. | 55 mH |
| B. | less than 0.2 mH |
| C. | less than 5.5 mH |
| D. | 5.5 mH |
| Answer» E. | |
| 56. |
A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is |
| A. | 9.9 mH |
| B. | greater than 5 mH |
| C. | 9.9 mH or greater than 5 mH |
| D. | less than 0.6 mH |
| Answer» E. | |
| 57. |
The voltage across a coil when di/dt = 20 mA/s and L = 8 H is |
| A. | 16 mV |
| B. | 160 mV |
| C. | 1.6 mV |
| D. | 2.5 mV |
| Answer» C. 1.6 mV | |
| 58. |
A series circuit has a 24 V source and a total resistance of 120 . The current through each resistor is |
| A. | 24 mA |
| B. | 200 mA |
| C. | 120 mA |
| D. | 20 mA |
| Answer» C. 120 mA | |
| 59. |
To measure the current out of the second resistor in a circuit consisting of four resistors, an ammeter can be placed |
| A. | between the second and third resistors |
| B. | at the negative terminal of the source |
| C. | between the third and fourth resistors |
| D. | at any point in the circuit |
| Answer» E. | |
| 60. |
A 12 V battery is connected across a series combination of 68 , 47 , 220 , and 33 . The amount of current is |
| A. | 326 mA |
| B. | 16.3 mA |
| C. | 32.6 mA |
| D. | 163 mA |
| Answer» D. 163 mA | |
| 61. |
A 12 k resistor, a 15 k resistor, and a 22 k resistor are in series with two 10 k resistors that are in parallel. The source voltage is 75 V. Current through the 15 k resistor is approximately |
| A. | 14 mA |
| B. | 1.4 mA |
| C. | 5 mA |
| D. | 50 mA |
| Answer» C. 5 mA | |
| 62. |
A 6 V battery output is divided down to obtain two output voltages. Three 2.2 k resistors are used to provide the two taps. The two output voltages are |
| A. | 2 V, 4 V |
| B. | 2 V, 2 V |
| C. | 2 V, 6 V |
| D. | 4 V, 6 V |
| Answer» B. 2 V, 2 V | |
| 63. |
Two 3.3 k resistors are in series and this series combination is in parallel with a 4.7 k resistor. The voltage across one of the 3.3 k resistors is 12 V. The voltage across the 4.7 k resistor is |
| A. | 24 V |
| B. | 12 V |
| C. | 0 V |
| D. | 6 V |
| Answer» B. 12 V | |
| 64. |
Three 15 mH inductors are in series. The total inductance is |
| A. | 15 mH |
| B. | 30 mH |
| C. | 45 mH |
| D. | 5 mH |
| Answer» D. 5 mH | |
| 65. |
A switch, a 220 resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed? |
| A. | 91 mA |
| B. | 78 mA |
| C. | 57 mA |
| D. | 400 mA |
| Answer» C. 57 mA | |
| 66. |
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field |
| A. | is quartered |
| B. | quadruples |
| C. | doubles |
| D. | does not change |
| Answer» B. quadruples | |
| 67. |
The inductance of an iron-core coil decreases if |
| A. | the number of turns is decreased |
| B. | the iron core is removed |
| C. | the length of the coil decreases |
| D. | none of the above |
| Answer» B. the iron core is removed | |
| 68. |
When a load resistance is removed from the output of a voltage divider circuit, the current drawn from the source |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | is cut off |
| Answer» B. increases | |
| 69. |
The parallel combination of a 470 resistor and a 1.5 k resistor is in series with the parallel combination of five 1 k resistors. The source voltage is 50 V. The percentage of the load current through any single 1 k resistor is |
| A. | 25% |
| B. | 20% |
| C. | 100% |
| D. | 50% |
| Answer» C. 100% | |
| 70. |
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit? |
| A. | 1 V |
| B. | 50 V |
| C. | 500 V |
| D. | 1,000 V |
| Answer» E. | |
| 71. |
A voltage divider consists of two 100 k resistors and a 12 V source. What will the output voltage be if a load resistor of 1 M is connected to the output? |
| A. | 0.57 V |
| B. | 6 V |
| C. | 12 V |
| D. | 5.7 V |
| Answer» E. | |
| 72. |
Three 680 resistors are connected in series with a 470 V source. Current in the circuit is |
| A. | 69 mA |
| B. | 230 mA |
| C. | 23 mA |
| D. | 690 mA |
| Answer» C. 23 mA | |
| 73. |
There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage |
| A. | is 6 V |
| B. | depends on the current flow |
| C. | depends on the resistor values |
| D. | is 30 V |
| Answer» E. | |
| 74. |
Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is |
| A. | 3 A |
| B. | 1 A |
| C. | 4 A |
| D. | 0.3 A |
| Answer» B. 1 A | |
| 75. |
All the voltage drops and the source voltage added together in a series circuit is equal to |
| A. | the total of the voltage drops |
| B. | the source voltage |
| C. | zero |
| D. | the total of the source voltage and the voltage drops |
| Answer» D. the total of the source voltage and the voltage drops | |
| 76. |
Two 1.5 V cells are connected series opposing across two 100 resistors in series. Total current flow is |
| A. | 15 mA |
| B. | 5 mA |
| C. | 2 mA |
| D. | 0 A |
| Answer» E. | |
| 77. |
Two 6 V batteries are connected series aiding across two 1.2 k resistors in series. Current through each resistor is |
| A. | 5 mA |
| B. | 10 mA |
| C. | 0 A |
| D. | 2.5 mA |
| Answer» B. 10 mA | |
| 78. |
When one of three series resistors is removed from a circuit and the circuit is reconnected, the current |
| A. | increases |
| B. | increases by one-third |
| C. | decreases by one-third |
| D. | decreases by the amount of current through the removed resistor |
| Answer» B. increases by one-third | |
| 79. |
The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates |
| A. | 12 W |
| B. | 48 W |
| C. | 3 W |
| D. | 8 W |
| Answer» D. 8 W | |
| 80. |
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed? |
| A. | 9 V |
| B. | 900 mV |
| C. | 0 V |
| D. | 18 V |
| Answer» B. 900 mV | |
| 81. |
If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be? |
| A. | 8 V |
| B. | 320 V |
| C. | 3.2 V |
| D. | 32 V |
| Answer» E. | |
| 82. |
When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is |
| A. | 14.4 V |
| B. | 1.4 V |
| C. | 100 V |
| D. | 10 V |
| Answer» B. 1.4 V | |
| 83. |
A resistance of 3.3 M is connected across a 500 V source. The resulting current is approximately |
| A. | 15.1 A |
| B. | 151 A |
| C. | 66 mA |
| D. | 660 mA |
| Answer» C. 66 mA | |
| 84. |
What is the voltage source for a circuit carrying 2 A of current through a 36 resistor? |
| A. | 1.8 V |
| B. | 18 V |
| C. | 7.2 V |
| D. | 72 V |
| Answer» E. | |
| 85. |
A voltage divider consists of two 68 k resistors and a 24 V source. The unknown output voltage is |
| A. | 12 V |
| B. | 24 V |
| C. | 0 V |
| D. | 6 V |
| Answer» B. 24 V | |
| 86. |
Resistance is measured in |
| A. | henries |
| B. | ohms |
| C. | hertz |
| D. | watts |
| Answer» C. hertz | |
| 87. |
A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is |
| A. | 0 V |
| B. | 1.2 V |
| C. | 6 V |
| D. | 0.6 V |
| Answer» D. 0.6 V | |
| 88. |
The formula to find I when the values of V and R are known is |
| A. | <i>I = VR</i> |
| B. | <i>I = R/V</i> |
| C. | <i>V = IR</i> |
| D. | <i>I = V/R</i> |
| Answer» E. | |
| 89. |
Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k of resistance? |
| A. | 27.2 mA |
| B. | 59 mA |
| C. | 5.9 mA |
| D. | 590 mA |
| Answer» D. 590 mA | |
| 90. |
Voltage is measured in |
| A. | volts |
| B. | farads |
| C. | watts |
| D. | ohms |
| Answer» B. farads | |
| 91. |
The number 0.0003 multiplied by 10-3 is |
| A. | 0.0000003 |
| B. | 0.0003 |
| C. | 3 |
| D. | 3,000 |
| Answer» B. 0.0003 | |
| 92. |
Current is measured in |
| A. | watts |
| B. | volts |
| C. | henries |
| D. | amperes |
| Answer» E. | |
| 93. |
Which of the following is not an electrical quantity? |
| A. | voltage |
| B. | current |
| C. | distance |
| D. | power |
| Answer» D. power | |
| 94. |
Seven thousand volts can be expressed as |
| A. | 7 kV |
| B. | 7 MV |
| C. | 7 mV |
| D. | either 7 kV or 7 mV |
| Answer» B. 7 MV | |
| 95. |
The number 4.4 106 ohms expressed using a metric prefix is |
| A. | 4 k |
| B. | 4.4 k |
| C. | 4 M |
| D. | 4.4 M |
| Answer» E. | |
| 96. |
The number of microamperes in 2 milliamperes is |
| A. | 2 A |
| B. | 20 A |
| C. | 200 A |
| D. | 2,000 A |
| Answer» E. | |
| 97. |
The number of millivolts in 0.06 kilovolts is |
| A. | 600 V |
| B. | 6,000 mV |
| C. | 60,000 mV |
| D. | 600,000 mV |
| Answer» D. 600,000 mV | |
| 98. |
Eighteen thousand watts is the same as |
| A. | 18 mW |
| B. | 18 MW |
| C. | 18 kW |
| D. | 18 W |
| Answer» D. 18 W | |
| 99. |
The number 3.2 10 5 A expressed using a metric prefix is |
| A. | 32 A |
| B. | 3.3 A |
| C. | 320 mA |
| D. | 3,200 mA |
| Answer» B. 3.3 A | |
| 100. |
How much current is produced by a voltage of 18 kV across a 15 k resistance? |
| A. | 1.2 A |
| B. | 12 A |
| C. | 120 mA |
| D. | 12 mA |
| Answer» B. 12 A | |