Question 1 of 20
What is the primary function of a resistor?
Resistors are designed to impede the flow of current in a circuit.
Question 2 of 20
What unit is used to measure resistance?
Resistance is measured in Ohms, represented by the Greek letter omega (?).
Question 3 of 20
What is the formula for calculating resistance?
Resistance (R) is calculated by dividing Voltage (V) by Current (I).
Question 4 of 20
In the formula R = V/I, what does 'V' represent?
V represents the voltage across the resistor.
Question 5 of 20
Resistors are manufactured in what type of values to meet requirements?
Resistors are made in preferred values, based on standards.
Question 6 of 20
What do the first two color bands on a resistor typically represent?
The first two bands indicate the digits for the resistance value.
Question 7 of 20
What does the third color band on a resistor indicate?
The third band indicates the multiplier.
Question 8 of 20
What does the fourth color band on a resistor indicate?
The fourth band represents the tolerance of the resistor.
Question 9 of 20
If a resistor has the color bands yellow, violet, red, and gold, what is its nominal resistance?
Yellow=4, Violet=7, Red= x100 (2 zeros), Gold=5% tolerance: 4700 Ohms, or 4.7K ohms.
Question 10 of 20
What is the tolerance of a resistor indicated by a silver band?
A silver band represents a tolerance of ±10%.
Question 11 of 20
What color represents the digit '0' in the resistor color code?
Black represents zero in the color code.
Question 12 of 20
Which color band represents a multiplier of 1000 (1k)?
Orange represents a multiplier of 1000 (1k).
Question 13 of 20
What is the role of a resistor in a circuit?
Resistors primarily limit the flow of current.
Question 14 of 20
What would the resistance be of a resistor with the color bands Brown, Black, Red, Gold?
Brown=1, Black=0, Red= x100 (2 zeros), Gold=5% tolerance: 1000 Ohms.
Question 15 of 20
A resistor with the bands Blue, Gray, Green, Gold, would have what resistance?
Blue=6, Gray=8, Green=x100000 (5 zeros), Gold=5%: 6.8 Mohms, which would be 6.8 kOhms
Question 16 of 20
If a resistor has a value of 220 ohms with a tolerance of 5%, what is the minimum resistance value?
5% of 220 is 11, so 220-11=209 ohms.
Question 17 of 20
What does a larger resistor value generally indicate?
A larger resistance means more opposition to the flow of current.
Question 18 of 20
What is the tolerance of a resistor represented by a gold band?
A gold band represents a tolerance of ±5%.
Question 19 of 20
What is the equivalent resistance of two 100-ohm resistors in series?
Resistors in series add up: 100 + 100 = 200 ohms.
Question 20 of 20
If the voltage across a resistor is 12V and the current is 2A, what is the resistance?
Using Ohm's Law (R = V/I), R = 12V / 2A = 6 ohms.
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