Quiz About Direct Current Circuit Basics And Analysis
Direct current is the one directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. A direct current circuit is an electrical circuit that consists of any combination of constant voltage sources, constant current sources, and resistors. This is a Quiz about Direct Current Circuit Basics and Analysis!
- 1.In a series-connected string of ornament bulbs, if one bulb gets shorted out, which of thefollowing will occur?
- A.
All the other bulbs will go out.
- B.
The current in the string will go up.
- C.
The current in the string will go down.
- D.
The current in the string will stay the same.
- 2.Imagine that four resistors are connected in series across a 6.0-V battery, and the ohmic values are R1 = 10 Ω, R2 = 20 Ω, R3 = 50 Ω, and R4 = 100 Ω. What is the voltage across the resistance R2?
- A.
0.18 V
- B.
33 mV
- C.
5.6 mV
- D.
0.67 V
- 3.Suppose three resistors are connected in parallel across a battery that delivers 15 V, and theohmic values are R1 = 470 Ω, R2 = 2.2 kΩ, and R3 = 3.3 kΩ. The voltageacross the resistance R2 is
- A.
4.4 V.
- B.
5.0 V.
- C.
15 V.
- D.
Not determinable from the data given.
- 4.Fill in the blank in the following sentence to make it true: “In a series or parallel dc circuit, thesum of the s in each component is equal to the total provided by the power supply.”
- A.
Current
- B.
Voltage
- C.
Wattage
- D.
Resistance
- 5.In a voltage divider network, the total resistance
- A.
Should be large to minimize current drain.
- B.
Should be as small as the power supply will allow.
- C.
Is not important.
- D.
Should be such that the current is kept to 100 mA.
- 6.The maximum voltage output from a voltage divider
- A.
Is a fraction of the power supply voltage.
- B.
Depends on the total resistance.
- C.
Is equal to the supply voltage.
- D.
Depends on the ratio of resistances.
- 7.Suppose you double the voltage in a simple dc circuit, and cut the resistance in half. Thecurrent will
- A.
Become four times as great.
- B.
Become twice as great.
- C.
Stay the same as it was before.
- D.
Become half as great.
- 8.You can expect to find a wiring diagram
- A.
On a sticker on the back of a television receiver.
- B.
In an advertisement for an electric oven.
- C.
In the service/repair manual for a two-way radio.
- D.
In the photograph of the front panel of a stereo hi-fi tuner.
- 9.Suppose six resistors are hooked up in series, and each of them has a value of 540 Ω.What is the resistance across the entire combination?
- A.
90 Ω
- B.
3.24 kΩ
- C.
540 Ω
- D.
None of the above
- 10.If 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.
- 11.Suppose you have three resistors in parallel, each with a value of 0.069 MΩ. Then the totalresistance is
- A.
23 Ω.
- B.
23 kΩ.
- C.
204 Ω.
- D.
0.2 MΩ.
- 12.Imagine three resistors in parallel, with values of 22 Ω, 27 Ω, and 33 Ω. If a 12-V battery isconnected across this combination, what is the current drawn from the battery?
- A.
1.4 A
- B.
15 mA
- C.
150 mA
- D.
1.5 A
- 13.Imagine three resistors, with values of 47 Ω, 68 Ω, and 82 Ω, connected in series with a 50-Vdc generator. The total power consumed by this network of resistors is
- A.
250 mW.
- B.
13 mW.
- C.
13 W.
- D.
Impossible to determine from the data given.
- 14.Suppose 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 × 3 resistors.
- B.
4 × 3 resistors.
- C.
4 × 4 resistors.
- D.
2 × 5 resistors.
- 15.Suppose you have an unlimited supply of 1-W, 1000-Ω resistors, and you need a 500-Ωresistance rated at 7 W or more. This can be done by assembling
- A.
Four sets of two resistors in series, and connecting these four sets in parallel.
- B.
Four sets of two resistors in parallel, and connecting these four sets in series.
- C.
A 3 × 3 series-parallel matrix of resistors.
- D.
A series-parallel matrix, but something different than those described above.
- 16.Suppose 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 × 2 series-parallel matrix.
- B.
Connect three of the resistors in parallel.
- C.
Make a 3 × 3 series-parallel matrix.
- D.
Do something other than any of the above.
- 17.Good engineering practice usually requires that a series-parallel resistive network be assembled
- A.
From resistors that are all different.
- B.
From resistors that are all identical.
- C.
From a series combination of resistors in parallel but not from a parallel combination of resistors in series.
- D.
From a parallel combination of resistors in series, but not from a series combination of resistors in parallel.
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