What determines the inductance of a coil?

A. The core material, the number of turns used to wind the core and the frequency of the current through the coil

B. The core material, the core diameter, the length of the coil and the number of turns of wire used to wind the coil

C. The core diameter, the number of turns of wire used to wind the coil and the type of metal used for the wire

D. The core material, the core diameter, the length of the coil and whether the coil is mounted horizontally or vertically

Answer: Option B