Consider a circular wire of radius a that carries a current I directed as shown below. P > Calculate the magnitude of the magnetic field at point P due to the circular wire. We assume that Point P lies on the axis of the circular wire. H

A proton is moving on the circular arc in the region of the magnetic field B as shown in the figure. What is the direc the field that keeps the proton on that path? O Out of the plane O towards left O Into the plane towards right V B

The figure shows a 1.59- m long semicircular wire segment carrying a 5.6-A current in the xy-plane immersed in a uniform 1.1-T magnetic field. Calculate the magnetic force magnitude on the wire segment. B

A long, cylindrical conductor of radius  has two cylindrical cavities each of diameter  through its entire length. A current  is directed out of the page and is uniform through a cross section of the conducting material. Find the magnitude and direction of the magnetic field in terms of  and  at .point  P1 .point P2

1) The total magnetic field to any current carrying conductor can be solved by a integration b laplacian c curl d differentiation 2) A charge is accelerated from rest through a potential difference. Which of the following is true? a The velocity of the charge is directly proportional to the magnitude of the potential difference b The acceleration of the charge is directly proportional to the square root of the magnitude of the potential difference. c The acceleration of the charge is directly proportional to the magnitude of the potential difference d The answer cannot be found on the other choices 3) Electric fields can be sources of magnetic fields. When does this happen?  a. When the electric field is static and the charge in the said electric field is moving with uniform velocity b. When the electric field is static c. The answer cannot be found on the other choices.  d. When the electric field is static and the charge in the said electric field is moving with constant…

(a) Find the magnitude of the magnetic field inside the wire. (b) Find the magnitude of the magnetic field outside the wire.

A wire carries current 0.500 A out of the page as shown. What is the magnetic field y direction at point P? P right down left up

Consider a short wire of length L, carrying a current I to the left. Define coordinates so that the wire is along the à axis, the current flows in the - direction, the y axis is vertical in the plane of the page and the 2 axis points out of the page. Which of the following expressions is an ap- proximate expression for the magnetic field at a point P on the y axis very close to the wire, i.e. a distance y < L below the mid- point of the wire? 1. B= 2(y2 + L2) O 2. B 0 3. B Hol 2ny Hol 4Vy2 + L² 4. B = Hol 4Ty 5. B = %3D O 6. B=-00 O, B = 47 (y2 + L2) 8. B = 27 Vy? + L2 40IL 2ny? 9. B = 10. B – _ 40! 2ny

I can't seem to figure out this what I missing from my calculation can you help me with this?

Consider a long, horizontal Large Wire with current of 10 A running through it. We want to levitate a horizontal, thin, 0.50 m length of wire above it. If the thin wire has a mass of 10 grams, and a current of 300 mA, how far above the Large Wire will it hover (net force of zero) due to magnetic and gravitational forces? A. If the thin wire hovers above the Large Wire due to their magnetic fields, are their currents going the same direction, or opposite directions. Explain. B. Draw a diagram and label the directions of currents, and all other relevant quantities and vectors. C. Find the distance above the Large Wire the small thin wire will hover (net force of zero). D. Would your answers to parts A and C change if we wanted to find a distance below (rather than above) the Large Wire that the smaller thin wire could hover, due to their magnetic fields. Explain. Don't calculate any values but draw a new diagram and explain how this situation compares to the problem above.