If coil radius = 20 cm, length of coil 100 cm, magnetic field constant $1.257*10^{-6}$, relatively permeability=1 and the inductance, the inductance=1.58mH , the number of turns in wire coil is
O a. 1
O b. 100
O c. 10
O d. 1000
Length (l)
Inner Core
Material
Cross-sectional
Area. (A)
Number of Turns (N)