alleryStart learning →A solenoid with a core of relative permeability mu_r has its field multiplied by:
Aa factor of mu_r
Ba factor of 1/mu_r
Ca factor of mu_r^2
Da factor of root mu_r
Answer & Solution
Correct answer: A. a factor of mu_r
With a core, B = mu0 mu_r N I/l, so the free-space field is increased by the factor mu_r.
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