Question

A solenoid of length $50 \,cm$ having $100$ turns carries a current of $2.5\, A$. 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)

$B =\frac{\mu_{0} ni }{2}$