Question

only find the resistance​

Answer 1

Voltage = Current × Resistance

→ 1.6 = 0.5 × R

→ R = 1.6/0.5 = 16/5

→ R = 3.2 Ω

{This is for the first values given. Since there will be a chance of zero error, the actual value of resistance may vary with different values. }