Problem Set 6.pdf - ProblemSet6 1.Ina1.,.50.

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Problem Set 6 1. In a 1.25T magnetic field directed vertically upward, a particle having a charge of magnitude 8.50ߤC and initially moving northward at 4.75km/s is directed toward the east. a) What is the sign of the charge of this particle? Make a sketch to illustrate how you found your answer. b) Find the magnetic force on the particle. 2. An electron at point ܣ in the figure has a speed ݒ of 1.41 ൈ 10 m/s . Find a) the magnitude and direction of the magnetic field that will cause the electron to follow the semi circular path from ܣ to ܤ and b) the time required for the electron to move from ܣ to ܤ . 3. A 150V battery is connected across two parallel metal plates of area 28.5cm and separation 8.20mm . A beam of alpha particles (charge ൅2݁ , mass 6.64 ൈ 10 ିଶ଻ kg ) is accelerated from rest through a potential difference of 1.75kV and enters the region between the plates perpendicular to the electric field as shown in the figure. What magnitude and direction of magnetic field are need so that the alpha particles emerge undeflected from between the plates?
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