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26-04-2024
Physics

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A long solenoid is formed by winding 20 turns/cm. The current necessary to produce a magnetic field of 20 millitesla inside the solenoid will be approximately
(μ04π=10−7 tesla-metre/ampere)
A.8.0 A
B.4.0 A
C.2.0 A
D.1.0 A

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