Which of the following statements are true for magnetic field lines? Magnetic fi

Question

Which of the following statements are true for magnetic field lines? Magnetic field lines are close together in regions of space where the magnitude of the magnetic field is weak, and they are father apart in regions where it is strong. Unlike electric field lines, magnetic field lines are continuous. Magnetic field lines can never intersect. Magnetic field lines point in the direction of the magnetic forte acting on a charge. At every point in space, the magnetic field vector at that point is tangent to the magnetic field line through that point. A proton moving eastward with a velocity of 5.0 Vm/s enters a magnetic field of 0.20 T pointing northward. What are the and direction of the force that the magnetic field exerts on the (e = 1.60 times 10^-19 C)

Explanation / Answer

7) F = I(L x B) = ILB*sin(theta) = 0 (Option E is correct)

8) Options b), c) and e) are correct.

9) F = q(v i^ x B j^) = qvB k^

F = 1.6*10^-19*5000*0.2 = 1.6*10^-16 N

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