A particle with charge q enters a region where there is a uniform magnetic field B = Bk. The initial velocity of the particle is (v = vî). The particle leaves the region with velocity (v = -–vj). Find the distance between the points where the particle enters and leaves the region with a uniform magnetic field. qB O b. 2mv V qB O c. V 2qB 2mu qB V2mv qB O o o O O

An alien from a planet in the galaxy M31 (Andromeda) has a ray gun that shoots protons at a speed of 2.0 × 10^5 m/s. Design a magnetic shield that will deflect the protons away from your body. A) Suppose that the magnetic field has horizontal direction and you want to deflect the beam through a path with radius R = 2.0 m as shown in (Figure 1). Find the field strength needed to achieve the desired deflection. The mass of a proton is 1.67× 10^−27 kg and its charge is 1.6× 10^−19 C. B) What is the direction of the magnetic field in the region defined in (Figure 1), that would cause the deflection shown for the proton beam? along the path of the proton beam into the page toward the center of the curved path out of the page C)What is the direction of the magnetic force in the region defined in (Figure 1), that would cause the deflection shown for the proton beam? along the path of the proton beam into the page toward the center of the curved path out of the page

An electron is moving to the right when suddenly a magnetic field is switched on that points out of the page. Describe the resulting path of the electron. O a clockwise circle in the plane of the page O a circular path coming out of the page on the right and into the page on the left O a counterclockwise circle in the plane of the page O a straight line O a circular path coming out of the page on the left and into the page on the right

i know the direction of the magnetic force on a proton is in the negative y direction and the direction of the magnetic force on an electron is in the positive y direction

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.

Three charged particles move in a magnetic field as shown. All the particles have the same mass and the same magnitude of charge. Which particle is moving the fastest? Which particles have positive charges, and which have negative charges?