# What exactly is a load resistor?

I understand what resistors are. When I go to my local electronic parts store, there is nothing labeled 'load resistor.' Can someone help me out? Is there a resistor type that will do the same thing as a load resistor?

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"Load resistor" is a discriptor, not a value.

Any resistor can be a load resistor if it is the proper value and power for your application.

So if you want a load resistor by itself, that makes no sense. A load resistor is a resistor selected for a specific purpose. For example, it you want to put a load on an audio amplifier made to drive an 8 ohm speaker to 50 watts, then your load resistor would be a 8 ohm 50 watt resistor.

If you want a load resistor to terminate a 50 ohm line, you would need a 50 ohm resistor, although in this case, you probably want one that is part of a co-ax connector.

A load resistor for an op-amp output is typically 2k, since most op-amps are rated for 10 volts at 5 mA.

Etc, etc.

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• stoll
Lv 4
4 years ago

• Anonymous
5 years ago

RE:

What exactly is a load resistor?

I understand what resistors are. When I go to my local electronic parts store, there is nothing labeled &#39;load resistor.&#39; Can someone help me out? Is there a resistor type that will do the same thing as a load resistor?

It's usually a resistor that's taking the place of something else. E.g. you want to test your power supply but you don't want to connect your expensive computer, you want to use something cheaper/tougher.

So you choose a resistor that will consume the same current and power as the real load.

• Robert
Lv 4
5 years ago

Load resistance are not differ than the normal resistance but it is used at the output of the circuit. Some special fact about the load resistance :

1) A heavy load will draw more current while a light load will draw a less current.

2) In the case of Load less circuit it will draw minimal current.

The main reason of applying these load is to increase or decrease the power at the load according the requirements(i.e to make remain constant power in the circuit), and It can be proved with the basic circuits law like KVL and KCL.

https://www.electrikals.com/

• 5 years ago

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The right answer : a) is exactly the same value.