What resistor value is this??

[Donny2derby]

I have a resistor I'm having trouble identifying because if I've read it right, it's a 0.01ohm value resistor, and why the hell would you use one of these?

1st band brown, 2nd black, 3rd silver 4th gold.

According to my chart that's a 1, 0 then move the decimal point two places to the left for the multiplier. I get .01??

Is this right? Picture attached. Thanks.

[petehall347]

0.1 Ω ±5%

[Donny2derby]

0.1 Ω ±5%

Thanks. What's the necessity for using such a small resistor?

[harp]

They are commonly used on power rail for measuring current, so that do as much as posible less afect to current path. Difference in voltage drop of both side is amplify and processed/feeding to control circuit.

[Donny2derby]

They are commonly used on power rail for measuring current, so that do as much as posible less afect to current path. Difference in voltage drop of both side is amplify and processed/feeding to control circuit.

Im not sure I understand?? It's used as a current sensing resistor?

And with such a small resistance there will be very little voltage drop?? So what is the purpose of having it??

[truclacicr]

Im not sure I understand?? It's used as a current sensing resistor?

And with such a small resistance there will be very little voltage drop?? So what is the purpose of having it??

The idea is to sense the current without appreciably disturbing the circuit that is being sensed. That's how the amps function in your multimeter works.

[Donny2derby]

The idea is to sense the current without appreciably disturbing the circuit that is being sensed. That's how the amps function in your multimeter works.

Ahhh ok. So it's part of the feedback circuit??

Would it usually be in parallel to something like a MOSFET then?

And a way to test it is to see if the MOSFET is switching?