Question

a tightly coil spring having 75 coils its 3.5cm in diameter it made up insulated metal wire 3.25mm in diameter and ohm meter connected across its opposite inch reads 1.74ohm what is resistivity of the metal​

Answer 1

Answer:

Given that the diameter of the wire is d = 3.25 mm =(3.25mm)(1m/1000mm)=3.25*10-3m Hence the radius of the wire is r =d/2=1.625*10-3m The resistance of the wire is R = 1.74 Ω The diameter of the each coil is D = 3.50cm = 3.50 *10-2m The radius of the each coil isR = 1.75*10-2m Number of turns is N = 75 Then the total length of the...