Question

State factors on which strength of magnetic fields of a current carrying solenoid depends.

Answer 1

The magnetic field inside the solenoid is given by formula $B={\mu }_{0}ni$.

$$\begin{gathered} whereB=magneticfield \\ n=numberofturnsofcoilperunitlength \\ i=currentinthecoil \end{gathered}$$

The magnetic field inside the solenoid is depends on current in the coil and number of turns .

1. Magnitude of current:- The magnetic field inside the solenoid is directly proportional to the current in the coil $\left(B\propto i\right).$
2. Number of turns per unit length:- The magnetic field inside the solenoid is directly proportional to the number of turns per unit length of coil $\left(B\propto n\right).$