Q51: A -W heating coil designed to operate from 110 V is made of Nichrome wire mm in diameter.
(a) Assuming the resistivity of the Nichrome remains constant at its C value, find the length of wire used.
(b) What If? Now consider the variation of resis- tivity with temperature. What power is delivered to the coil of part (a) when it is warmed to C?
ΔV(operating voltage of the heating coil)=