Hi,

i need help in transposing this fomula

u=e-(i x r)

where,

u=terminal voltage

e=E.M.F

i=current

r=internal resistance

i want to caculate r (internal resistance). i cant transpose this formula to the extend as it confuses me.

i have ended up doing in this way and it may be right or may be wrong but please explain me.

(u-e) divided by i = r

therefore

r = u-e divided by i

please explain me.

thankyou.