1.
The resistor has 4 bands.
Red, Green, Blue, Gold
Which answer is correct?
Correct Answer
B. 25M Ohms with a 5% Tolerance and a 2.5M Ohm tolerance range
Explanation
The correct answer is 25M Ohms with a 5% Tolerance and a 2.5M Ohm tolerance range. This is because the resistor has 4 bands, and the color code for the first three bands (Red, Green, Blue) corresponds to the value of 25M Ohms. The fourth band (Gold) indicates a tolerance of 5%, meaning the actual resistance value can vary within 5% of the stated value. The 2.5M Ohm tolerance range indicates that the resistance can vary by +/- 2.5M Ohms.
2.
The resistor has 4 bands.
Green, Blue, Red, Silver
Which answer is correct?
Correct Answer
D. 5.6K Ohms with a 10% Tolerance and a 1120 Ohm tolerance range
Explanation
The resistor has 4 bands, which means it is a 4-band resistor. The colors of the bands are green, blue, red, and silver. By decoding the colors using the resistor color code, we can determine the resistance value, tolerance, and tolerance range. The colors green, blue, and red correspond to the digits 5, 6, and 0, respectively. The silver band represents a multiplier of 0.01. Therefore, the resistance value is 56K Ohms (56000 Ohms). The green band indicates a tolerance of 5%, and the blue band indicates a multiplier of 10. Therefore, the correct answer is 5.6K Ohms with a 10% Tolerance and a 1120 Ohm tolerance range.
3.
The resistor has 4 bands.
Yellow, Brown, Brown, Gold
Which answer is correct?
Correct Answer
E. 410 Ohms with a 5% Tolerance and a 41 Ohm tolerance range
Explanation
The given resistor has four bands: yellow, brown, brown, and gold. By using the color code chart for resistors, we can determine the values of these bands. The first band, yellow, represents the digit 4. The second band, brown, represents the digit 1. The third band, brown, represents a multiplier of 10, which means the value is multiplied by 10. The fourth band, gold, represents a tolerance of 5%. Therefore, the resistor has a value of 410 Ohms with a 5% tolerance and a 41 Ohm tolerance range.
4.
The resistor has 4 bands.
Brown, Back, Red, Gold
Which answer is correct?
Correct Answer
B. 1000 Ohms with a 5% Tolerance and a 100 Ohm tolerance range
Explanation
The given answer is correct because the resistor has a brown band as the first digit, which represents the number 1. The second band is black, representing the second digit 0. The third band is red, representing a multiplier of 100, and the fourth band is gold, representing a tolerance of 5%. Therefore, the resistor value is 1000 Ohms with a 5% tolerance. The tolerance range is calculated by multiplying the resistance value by the tolerance percentage, so in this case, the range is 100 Ohms.
5.
What is the resistivity of copper?
Correct Answer
C. 1.724x10-8
Explanation
Copper exhibits a low electrical resistivity of 1.724x10-8. This small value reflects its exceptional conductivity, with abundant free electrons facilitating efficient flow of electric current. This property makes copper a vital material in various electrical applications, including wiring and conductors.
6.
How is a fully functional 3.9 k ohms resistor color coded?
Correct Answer
D. Orange, white, red, gold
Explanation
The color code for a 3.9 k ohms resistor is orange, white, red, gold. The first band, orange, represents the digit 3. The second band, white, represents the digit 9. The third band, red, represents the multiplier 100. Therefore, the resistance value is calculated as (39 x 100) = 3,900 ohms, which is equivalent to 3.9 k ohms. The fourth band, gold, represents the tolerance of the resistor, indicating that the actual resistance can vary by +/- 5%.
7.
The electrical component that is designed to resist the flow of the current?
Correct Answer
B. Resistors
Explanation
Resistors are electrical components specifically designed to resist the flow of current in a circuit. They are made of materials with high resistance, such as carbon or metal alloys, which limit the flow of electrons. By providing resistance, resistors help control the amount of current flowing through a circuit and protect other components from excessive current. Unlike conductors, which allow easy passage of current, and insulators, which prevent the flow of current altogether, resistors offer a controlled level of resistance to regulate the flow of electricity.
8.
One can identify the wattage of a resistor by what?
Correct Answer
C. By it's size
Explanation
The wattage of a resistor can be identified by its size. Different sizes of resistors are designed to handle different power levels. Larger resistors are typically able to handle higher wattages, while smaller resistors are designed for lower wattages. By comparing the size of a resistor to a reference chart or datasheet, one can determine its wattage rating.
9.
If the resistance of the system decreases, what happens to the current?
Correct Answer
C. It increases
Explanation
When the resistance of a system decreases, according to Ohm's Law (V = IR), the current increases. This is because as resistance decreases, there is less opposition to the flow of electric current. Therefore, more current can flow through the system.