Very simple, am I right in thinking that a 2k resistor has a resistance of 0.2 ohm?

No, 2,000 ohms.

That’s what the k stands for, same as in everything else.

Beat me to it! Bloody phone…

Yeah the k means 2×10^3ohms.

As with metres, 1km = 1×10^3m

generally speaking:

2k = 2000 ohms
2k5 = 2500 ohms
2R = 2 ohms
2R5 = 2.5ohms
0.2R = 200 milliohm

Great, thanks.

Yep 2K = 2000 ohms

think the resistor colour bands should be red black red
the whatever bannds for tolerance of say 5%

Ohms are one of those units that comes out pretty small for general usage. 1 Ohm is very low, 2k is a fairly small one, 2M even is quite common in electronics.

Conversely, Farads are pretty big units. A 1F capacitor is massive, the big fat ones you see inside things are micro Farads, and pico Farads are common.