One out of the following statements is not true:

A) The curl of gradient of any scalar field is identically zero
B) The divergence of curl of any vector field is identically zero
C) A field, which has zero divergence, is said to be solenoidal
D) A field, whose curl is zero, is said to be rotational 

Capacitance grading of cable implies

A) grading according to capacitance of cables per kilometer length
B) cables using single dielectric in different concentrations
C) use of dielectrics of different permeabilities
D) capacitance required to be introduced at different length to counter the effect of inductance

A single phase transmission line consists of two parallel conductors one meter apart and 1.25 cm in diameter. The loop inductance per km of the line is:

A) 21.3 x 10-4 Henry/ km
B) 34.3 x 10-7 Henry/ km
C) 11.5 x 10-7 Henry/ km
D) 19.5 x 10-7 Henry/ km