Acoaxial cable consists of inner and outer conductors having radii, a and b respectively. they also have charge per unit length of + and respectively. both conductors are thin shells. for this arrangement calculate (using gauss' theorem or otherwise): (a) the electric field at a distance r from the centre of the cable. (b) the potential difference between the conductors. (c) the capacitance of the cable per unit length. (d) the field outside the cable. (e) what is the amount of energy stored per unit length in this configuration, as a function of both and v?