If a current of 15 A passes through a solenoid of length 25 cm, radius 2 cm and number of turns 500, then the magnetic moment of the solenoid is

• A

  $6 \mathrm{~J} \mathrm{~T}^{-1}$
• B

  $3 \mathrm{~J} \mathrm{~T}^{-1}$
• Correct answer
  C

  $3 \pi \mathrm{~J} \mathrm{~T}^{-1}$
• D

  $6 \pi \mathrm{~J} \mathrm{~T}^{-1}$

Hence, the correct answer is option: 'C'.