# Quiz About Direct Current Circuit Basics And Analysis

17 Questions | Attempts: 1433  Settings  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.

• 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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