Suppose you might have seen the cable laying and the ground right if the external radius R2 buried h meter below the ground surface in the I mean you assume that cable radius is your what you call R2 and buried h meter below the ground surface in a soil of constant thermal resistivity say; g3 the thermal field exactly analogous to the electric field having only dimension is different for various quantities because it is analogous to electric field between a single overhead line conductor and the ground plane right.
ती एकच ओव्हरहेड लाइन कंडक्टर आणि ग्राउंड प्लेन दरम्यान इलेक्ट्रिक फील्ड सारखी आहे. ठीक आहे.