7) What is a \"gauss\" and how does it compare to the tesla? 8) If a charged par

Question

7) What is a "gauss" and how does it compare to the tesla? 8) If a charged particle moves in a straight line through some region of space, can you say that the magnetic field in that region is necessarily zero? 9) Can you set a resting electron in motion with a magnetic field? Explain. 10) What is the direction of the magnetic force on a positive charge that moves as shown in each of the six cases shown in Figure 22.50 (page 891). a) b) c) d) c) 11) What is the formula for finding the radius of curvature of the path of a charged particle with the mass m and charge q moving at a speed v? 12) A cosmic ray electron moves at 7.50 E6 m/s perpendicular to the Earth's magnetic field at an altitude where the field strength is 1.00 E-5 T. What is the radius of the spiral path the electron follows? 13) An electron moves perpendicular to a magnetic field of 0.12 T. What is its speed if the force exerted on it is 8.9 E-15 N? 14) At a certain location, the horizontal component of the earth's magnetic field is 2.5 E -5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

Explanation / Answer

7) gauss is cgs unit for magnetic field. 1 gauss = 10-4 tesla

8) No, if the field is parallel to the motion, motion can be straight.

9) No, magnetic forces acts only on moving charged particles

11) r = mv/qB

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