Quiz V9.0 Resistor Networks. Beginner Level.

Credits to: Derstrom

Attempt All 10 Questions.....Unanswered questions will be considered Incorrect

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Q1: You want to run a 2.2 volt LED from a 12 volt supply.
If the LED uses a MAXIMUM of 20 milliamps of current, what value of series resistance is required so as not to burn out the LED?

120 ohms
240 ohms
370 ohms
490 ohms
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Q2: Using the setup described in Q1, what is the closest 10% common resistor value needed in the circuit?


470 ohms
520 ohms
560 ohms
680 ohms
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Q3: If a 60 hertz square wave is fed into a circuit that flashes an LED once every cycle, how many times does the LED flash in 2.8 seconds?



140 times
154 times
168 times
180 times
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Q4: There are two resistors in series, connected to an 8 volt power source. One has a color code of brown-black-brown-gold, and the other is missing the bands. If the circuit draws 25mA,
what is the resistance of the unknown resistor?

220 ohms
270 ohms
330 ohms
390 ohms
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Q5: When you have four identical capacitors wired in parallel


The total capacitance is 4 times the value of a single capacitor
The total capacitance is 1/4 of the value of a single capacitor
The total capacitance is the capacitance to the fourth power of an individual cap
The total capacitance is the fourth root of the capacitance of a single cap
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Q6: What is an inductor?


A device like a resistor that limits voltage to a desired level
A device that is a type of transformer
A device that impedes the flow of alternating current
A device that impedes the flow of direct current
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Q7: Kirchoff's voltage law states that:


The sum of all currents at a given node in a circuit must equal zero
The sum of all voltages at a given node in a circuit must equal 0
The sum of all the currents at a given node in a circuit must equal 0
The sum of all voltages at a given node in a circuit must equal 1
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Q8: If a 4.7k resistor is connected to a 12 volt supply,
what is the power dissipated by the resistor?


About 3 milliwatts
About 30 milliwatts
About 300 milliwatts
About 3000 milliwatts
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Q9: What is the RMS voltage of a source that produces a sine wave with a peak-to-peak voltage of 12 volts?



About 2.12 volts
About 2.83 volts
About 4.24 volts
About 8.48 volts
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Q10: What is the total resistance between point A and B in the circuit shown below?
Fig1


154.25 ohms
394.01 ohms
494.01 ohms
1254.34 ohms
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