# What is a 1 4W resistor?

## What is a 1 4W resistor?

1/4W means – The maximum power dissapation should not exceed 250mW. 1/2W means- The maximum power dissapation should not exceed 500mW. U have to calculate the current through the resistor according to ur resistor value and find the power dissipation. P = I * I * R. If ur P is < 250mW then use 1/4W and vice vera.

## What is 22K resistor?

22K Ohm 2W High Quality Carbon Film Resistor (CFR) with ±5% Tolerance and Tin Plated Copper Leads. 22K Ohm Resistor Color Code: Red, Red, Orange, Golden. Resistance: 22K Ohm, Power Rating: 2 Watts, Approximate Maximum Current: 9.54mA.

How do I choose a resistor?

To select a resistor for a specific application, the following steps are recommended:

1. 1 . (a) Determine the Resistance.
2. 2 . Determine the proper “Watt Size” (physical size) as controlled by.
3. 3 .
4. step 1 deteRmiNe ResistANce ANd wAtts.
5. step 2 poweR RAtiNg oR physicAl size oF ResistoR.
6. Ambient Temperature.
7. Enclosure.
8. Grouping.

### Can I use a higher ohm resistor?

Usually, using a higher value resistor in series with LEDs will make less current flow and make the LEDs burn op less brightly. You might not notice much difference though. So go ahead and try the 100 Ohms, it will probably just work.

### Is it OK to use a lower wattage resistor?

Wattage refers to the maximum that a resistor can dissipate. So subbing a higher wattage for lower is perfectly fine without any changes.

What is the color code for a 22 ohm resistor?

Value First Color Second Color
18* Brown Gray
20 Red Black
22* Red Red
24 Red Yellow

## What color is a 20K resistor?

20K Ohm Resistor Color Code: Red, Black, Orange, Golden. Resistance: 20K Ohm, Power Rating: 1 Watt, Approximate Maximum Current: 7.07mA .

## How do I know what wattage resistor to buy?

Generally speaking the larger their physical size the higher its wattage rating. However, it is always better to select a particular size resistor that is capable of dissipating two or more times the calculated power.

What happens if resistor is too large?

For a simple LED circuit there are no bad consequences of using a resistor of higher power. On the other hand, some type of high speed communication system may not like the increased capacitance to ground of a large resistor or, the increased series inductance.

### Is it okay to replace a resistor with a lower Ohm rather than the original?

If you’ve got a smaller powered resistor and you replace it with one with a higher power, then there will be no difference.