Q. D is the diameter of internal sheath and d is diameter of core, the most economical conductor diameter d is
A. d = D
B. d = 1/D
C. d = D/ 2.718
D. d = D x 2.718
Answer: d = D/ 2.718
A. d = D
B. d = 1/D
C. d = D/ 2.718
D. d = D x 2.718
Answer: d = D/ 2.718