Electrical Cables
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to

Absence of harmonics
None of the listed here
Nonexistence of any stability limit
Smaller dielectric loss

ANSWER DOWNLOAD EXAMIANS APP

Electrical Cables
Capacitance grading of cable implies

Use of dielectrics of different permeabilities
Capacitance required to be introduced at different lengths to counter the effect of inductance
Grading according to capacitance of cables per km length
Cables using single dielectric in different concentrations

ANSWER DOWNLOAD EXAMIANS APP