Question

The slope of the V-I curve is 17.587^o. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

(a) .322 Ω

(b) .360 Ω

(c) .316 Ω

(d) .778 Ω

This question was addressed to me in class test.

I'd like to ask this question from Regenerative Braking of DC Series Motors in portion Braking of DC Motors & Induction Motors of Electric Drives

Answer 1

Right option is (c) .316 Ω

The explanation is: The slope of the V-I curve is resistance. The slope given is 17.587^o so R=tan(17.587^o)=.316 Ω. The slope of the I-V curve is reciprocal of resistance.