When placing a resistor inline, does it make any difference which way the resistor is placed??

Ive got a 560 ohm resisitor i need to place in a power wire but I dont know if it makes a difference which end goes first.

also, this is for a 12 volt car system, going to a 1.7 volt, 20 Amp LED...should I get a 1/4, 1/2 or 1 watt resistor??

Thanks

thanks

 

No, it doesn't matter. Resistors have no polarity.

 

okay, thats that then. thanks.

WHat about the Watt???

 

20 Amp you mean 20 Milliamp maybe?

490 ohm resistor is a common value and a 1/4 watt is plenty

 

yeah, 20mA, and I got 560 ohm resistor, 1/2 watt...both are a bit high but I guess ill see how they work.

Thanks for all the help!!