Find the magnitude and direction of the magnetic field at the point P generated by the current carrying wire and loop depicted in the figure. R

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At the equator, near the surface of Earth, the magnetic field is approximately 65.0 ?T northward and the electric field is about 300 N/C downward in fair weather. Find the gravitational, electric, and magnetic forces on an electron with instantaneous velocity of 6.00  106 m/s directed to the east in this environment. gravitational  N      electric  N   magnetic  N

A long hairpin is formed by bending a very long wire, as shown. a) If the wire caries a current of 12 A, what is the magnitude and direction of the magnetic field at the point a? Take R = 6 mm. Take the sign of B to be positive if the direction is out of the paper and negative if B is into the paper. You need to enter the number with its sign and a space and the unit.  b)What is the magnitude and direction of the magnetic field at the midpoint b? The distance between a and b are much larger than R (each straight section is "infinite"). Take the sign of B to be positive if the direction is out of the paper and negative if B is into the paper.