Stan Gibilisco Electronics Book MCQ: Basic DC Circuits
This is the MCQs for Gibilisco: CHAPTER 4 - BASIC DC CIRCUITS
- 1.Suppose you double the voltage in a simple dc circuit, and cut the resistance in half. The current will become:
- A.
Four times as great
- B.
Twice as great
- C.
The same as it was before
- D.
Half as great
- 2.A wiring diagram would most likely be found in:
- A.
An engineer’s general circuit idea notebook
- B.
An advertisement for an electrical device
- C.
The service/repair manual for a radio receiver
- D.
A procedural flowchart
- 3.Given a dc voltage source delivering 24 V and a circuit resistance of 3.3 KΩ, what is the current?
- A.
0.73 A
- B.
138 A
- C.
138 mA
- D.
7.3 mA
- 4.Suppose that a circuit has 472 Ω of resistance and the current is 875 mA. Then the source voltage is:
- A.
413 V
- B.
0.539 V
- C.
1.85 V
- D.
None of the above
- 5.The dc voltage in a circuit is 550 mV and the current is 7.2 mA. Then the resistance is:
- A.
0.76 Ω
- B.
76 Ω
- C.
0.0040 Ω
- D.
None of the above
- 6.Given a dc voltage source of 3.5 kV and a circuit resistance of 220 Ω, what is the current?
- A.
16 mA
- B.
6.3 mA
- C.
6.3 A
- D.
None of the above
- 7.A source delivers 12 V and the current is 777 mA. Then the best expression for the resistance is:
- A.
15 Ω
- B.
15.4 Ω
- C.
9.3 Ω
- D.
9.32 Ω
- 8.A circuit has a total resistance of 473,332 Ω and draws 4.4 mA. The best expression for the voltage of the source is:
- A.
2082 V
- B.
110 kV
- C.
2.1 kV
- D.
2.08266 kV
- 9.The voltage is 250 V and the current is 8.0 mA. The power dissipated by the potentiometer is:
- A.
31 mW
- B.
31 W
- C.
2.0 W
- D.
2.0 mW
- 10.The voltage from the source is 12 V and the potentiometer is set for 470 Ω. The power is about:
- A.
310 mW
- B.
25.5 mW
- C.
39.2 W
- D.
3.26 W
- 11.The current through the potentiometer is 17 mA and its value is 1.22KΩ. The power is:
- A.
0.24 μW
- B.
20.7 W
- C.
20.7 mW
- D.
350 mW
- 12.Suppose six resistors are hooked up in series, and each of them has a value of 540 Ω. Then the total resistance is:
- A.
90 Ω
- B.
3.24 KΩ
- C.
540 Ω
- D.
None of the above
- 13.Four resistors are connected in series, each with a value of 4.0 KΩ. The total resistance is:
- A.
1 KΩ
- B.
4 KΩ
- C.
8 KΩ
- D.
16 KΩ
- 14.Suppose you have three resistors in parallel, each with a value of 68,000 Ω. Then the total resistance is:
- A.
23 Ω
- B.
23 KΩ
- C.
204 Ω
- D.
0.2 MΩ
- 15.
There are three resistors in parallel, with values of 22 Ω, 27Ω, and 33 Ω. A 12-V battery is connected across this combination, as shown in Fig. 4-11. What is the current drawn from the battery by this resistance combination?- A.
1.3 A
- B.
15 mA
- C.
150 mA
- D.
1.5 A
- 16.
Three resistors, with values of 47 Ω, 68 Ω, and 82 Ω, are connected in series with a 50-V dc generator, as shown in Fig. 4-12. The total power consumed by this network of resistors is:
- A.
250 mW
- B.
13 mW
- C.
13 W
- D.
Not determinable from the data given
- 17.You have an unlimited supply of 1-W, 100-Ω resistors. You need to get a 100- Ω, 10-W resistor. This can be done most cheaply by means of a series-parallel matrix of
- A.
3 X 3 resistors
- B.
4 X 3 resistors
- C.
4 X 4 resistors
- D.
2 X 5 resistors
- 18.You have an unlimited supply of 1-W, 1000-Ω resistors, and you need a 500-Ω resistance rated at 7 W or more. This can be done by assembling
- A.
Four sets of two 1000-Ω resistors in series, and connecting these four sets in parallel
- B.
Four sets of two 1000-Ω resistors in parallel, and connecting these four sets in series
- C.
A 3 X 3 series-parallel matrix of 1000-Ω resistors
- D.
Something other than any of the above
- 19.You have an unlimited supply of 1-W, 1000-Ω resistors, and you need to get a 3000-Ω, 5-W resistance. The best way is to:
- A.
Make a 2 X 2 series-parallel matrix
- B.
Connect three of the resistors in parallel
- C.
Make a 3 X 3 series-parallel matrix
- D.
Do something other than any of the above
- 20.Good engineering practice usually requires that a series-parallel resistive network be made:
- A.
From resistors that are all very rugged
- B.
From resistors that are all the same
- C.
From a series combination of resistors in parallel
- D.
From a parallel combination of resistors in series
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