Moving Charges and Magnetism

Question: A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is



1) B
2) 2 B
3) 4 B
4) B/2
Solution: Explanation: No Explanation
Biot-Savart's Law Amperes Law

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