Exercise 28.4 3 of 11 > Part A An alpha particle (charge +2e) and an electron mo

Question

Exercise 28.4 3 of 11 > Part A An alpha particle (charge +2e) and an electron move in opposite directions from the same point, each with the speed of 2.30x 105 m/s (Figure 1). Find the magnitude of the total magnetic field these charges produce at point P, which is 8.40 nm from each charge Express your answer with the appropriate units. B-13.353-10 5T Previous Answers Request Answer X Incorrect, Try Again; 2 attempts remaining Figure 1 of 1 ? Part B Find the direction of this magnetic field. to the right into the page to the left 140° out of the page Electron Alpha particle Correct

Explanation / Answer

The Net magnetic field at point P is Vector sum of both field point out of page

B=Belectron+Balpha

B=uo*e*v*r*sin40/4pir3+uo*2e*v*r*sin140/4pir3

B=(uo*e*v/4pir2)[sin40+2sin140)

B=[(4pi*10-7)(1.6*10-19)(2.3*105)/4pi*(8.4*10-9)2]*1.928

B=1*10^-4 T

b)

out of the page

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