Solenoid: An ideal solenoid having a coil density of 5000 turns per meter is 10 cm long and carries a current of 4.0 A. What is the strength of the magnetic field at its center?
A. 3.1 mT
B. 6.2 mT
C. 13 mT
D. 25 mT
Answer: D
Physics & Space Science
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