creasing radius. Indicate the direction of the current in one ring (a) as the metal swings down from the left into the magnet- ic field and (b) as the metal swings up to- ward the right out of the magnetic field. Use Lenz's law to justify your answers.

What is the magnetic field at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wire? Hint: B=μ0I2rB=μ0I2r   Group of answer choices A) 3.1X10-5 T B) 3.1X10-6 T C) 2.8X10-5 T D) 3.1X10-3 T   Please show work and give explanations. I thank you very much for your time and guidance!

A very long straight current carrying wire produces a magnetic field of 20 mT at a distance D from the wire to measure a field of 40 mT due to this wire, you would have to go to a distance of...? A. D/4 B. D C.4D D.D/2 E.2D

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