Recall and use the equation for two resistors used as a potential divider R₁/R₂ = V₁/V₂
Recall and use the equation resistance = p.d. / current, R = V/I
Recall and use the equation for two resistors used as a potential divider R₁/R₂ = V₁/V₂
Recall and use the equation resistance = p.d. / current, R = V/I