The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to__________?
		A. absence of harmonics
B. non-existence of any stability limit
C. smaller dielectric loss
D. absence of ripples
E. none of the above
		A. absence of harmonics
B. non-existence of any stability limit
C. smaller dielectric loss
D. absence of ripples
E. none of the above
		A. be acid proof
B. be non-inflammable
C. be non-hygroscopic
D. have all above properties
		A. 5 kV/mm
B. 10 kV/mm
A. 15 kV/mm
D. 30 kV/mm
		A. insulation may melt due to higher temperature
B. skin effect dominates on the conductor
C. of corona loss between conductor and sheath material
D. there is a danger of breakdown of insulation due to the presence of voids
		A. mica insulated
B. paper insulated
C. compressed oil or compressed gas insulated
D. rubber insulated
E. none of the above
		A. sheath
B. insulator
E. surface of the conductor
D. core of the conductor
		A. more perfect impregnation
B. smaller overall size
C. no ionisation, oxidation and formation of voids
D. all of the above