The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to__________?
Correct answer: C. smaller dielectric loss
- A. absence of harmonics
- B. non-existence of any stability limit
- C. smaller dielectric loss
- D. absence of ripples
- E. none of the above
Explanation
A DC cable has no alternating electric field and therefore does not suffer AC dielectric loss; it also avoids AC charging-current effects. Hence its permissible current is generally higher, with smaller dielectric loss being the best listed choice.
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