Question

A solenoid of length $50cm$ having $100$ turns carries a current of $2.5A$. The magnetic field at one end of the solenoid is

• A. $1.57\times 10^{-4}T$
• B. $9.42\times 10^{-4}T$
• C. $3.14\times 10^{-4}T$
• D. $6.28\times 10^{-4}T$

Answer 1

Answer: (C)

$B=\frac{{\mu }_{0}ni}{2}$