Draw a square ABCD with 3 long current carrying wires at A,B,C such that 1 at A into the page, 12 at B also into the page and 13 at C coming out of the page. Label magnetic fields produced by each current at D as follows. magnetic field due to 11 as B1, Magneti field due to 12 as B2, and magnetic field due to 13 as B3.

3. A semicircular wire carries a current I in a uniform magnetic fieldB as shown in the figure. Show that the total magnetic force on the wire is _ 2IBR} y В

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