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OpenStudy (anonymous):
A current of 3.20 A in a solenoid produces a magnetic field of 4.0 x 10^-3 T. The current is changed to 6.40 A. What is the magnitude of the magnetic field after the change? A. 1.0 x 10^-3 T B. 16 x 10^-3 T C. 2.0 x 10^-3 T D. 8.0 x 10^-3 T
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