Question

Find the potential between a(-7,2,1) and b(4,1,2). Given E = (-6y/x^2 )i + ( 6/x) j + 5 k.

(a) -8.014

(b) -8.114

(c) -8.214

(d) -8.314

This question was posed to me during an interview for a job.

This interesting question is from Line Integral in division Vector Calculus of Electromagnetic Theory

Answer 1

Right option is (c) -8.214

The best I can explain: V = -∫ E.dl = -∫ (-6y/x2 )dx + ( 6/x)dy + 5 dz, from b to a.

On integrating, we get -8.214 volts.