- 1 What are the color bands on the resistor and what is their purpose?
- 2 What are the bands on a resistor for?
- 3 What does the first Coloured band on a resistor represent?
- 4 How can you tell the value of a resistor using color code?
- 5 How do you find the maximum and minimum tolerance of a resistor?
- 6 What resistor do I need for LED?
- 7 Why do some resistors have 5 bands?
- 8 Which resistor will prevent the most current flow?
- 9 What is the purpose of resistor?
What are the color bands on the resistor and what is their purpose?
The color of the band determines the power of 10 you need to multiply the first two resistor digits by. For example an orange third band with a digit value of 3 would indicate a multiplier of 103, though you can also just think of this as telling you to “stick 3 zeros on the end”. Example: Brown-black-orange resistor.
What are the bands on a resistor for?
Practically all leaded resistors with a power rating up to one watt have a pattern of colored bands that are used to indicate resistance value, tolerance, and sometimes even the temperature coefficient.
What does the first Coloured band on a resistor represent?
Calculating Resistor Color Codes The first band is the brown band closest to the edge. We look up our resistor color code chart, and find that brown has the 1st significant value of 1 and black has the second significant value of 0. The third band is brown, which means that the multiplier is 1.
How can you tell the value of a resistor using color code?
Reading and Determining the Resistor Value Hold the resistor with the gold or silver band to the right and read the color codes from the left to the right. Select the color codes from the bands on the resistor. Read the colors from left to right. The resistance value based on the color code provided is now displayed.
How do you find the maximum and minimum tolerance of a resistor?
Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1). Then take the nominal value and multiply it by 1 – tolerance, or (1-0.1). The highest possible value is 517 K. The lowest possible value is 423 K.
What resistor do I need for LED?
LEDs typically require 10 to 20mA, the datasheet for the LED will detail this along with the forward voltage drop. For example an ultra bright blue LED with a 9V battery has a forward voltage of 3.2V and typical current of 20mA. So the resistor needs to be 290 ohms or as close as is available.
Why do some resistors have 5 bands?
The 5th color band on the right side represent the tolerance of the resistor and the 6th color band represents the TCR (Temperature Co-efficient of Resistance). The 1st color band indicates the 1st significant value of the resistors value. The 2nd color band indicates the 2nd significant value of the resistors value.
Which resistor will prevent the most current flow?
Which resistor will prevent the most current flow The correct answer is 1000 | Course Hero.
What is the purpose of resistor?
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.