# Shunt resistors difference

What's the difference between metal and normal high wattage resistors?

That piece of wire is similar to the shunt you might find in a cheap digital multimeter. If so, it will typically be designed to drop 100 mV at 10 A so the power dissipated in it will be given by $$\ P = VI = 0.1 \times 10 = 1 \ \text W \$$. If it is any way decent it will have a tolerance of ±1% and be fairly stable with temperature.