Answer:
This has all the answer (Data sheet, graph, answers to the questions, and the summary) :)
Do u know Chinese ?if yes I can explain to u easily
R = U : I. U is in Voltage and I is in Ampère. That gives you R = 36 : 8 = 4,5 Ohm
Magnetic fields are an area around a magnetic material or a moving electric charge with which the force of magnet