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21. An electron (q = -1.60 × 1019 C, me = 9.11 × 10–31 kg) with an instantaneous velocity v = 1.50 x 106 m/s in the +y direction is moving through a region of constant magnetic field with B = 0.250 T (directed into the page) as shown in the figure. х х х х y L. X. V a) What are the magnitude and direction of the magnetic force acting on the electron? b) What is the radius of the electron's circular trajectory in this magnetic field? c) What is the period of the electron's circular motion?

21. An electron (q = -1.60 × 1019 C, me = 9.11 × 10–31 kg) with an instantaneous velocity v = 1.50 x 106 m/s in the +y direction is moving through a region of constant magnetic field with B = 0.250 T (directed into the page) as shown in the figure. х х х х y L. X. V a) What are the magnitude and direction of the magnetic force acting on the electron? b) What is the radius of the electron's circular trajectory in this magnetic field? c) What is the period of the electron's circular motion?

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21. An electron (q = -1.60 × 1019 C, me = 9.11 x 10–31 kg) with an instantaneous velocity v = 1.50 x 106 m/s in the +y direction is moving through a region of constant magnetic field with B = 0.250 T (directed into the page) as shown in the figure. L. y V a) What are the magnitude and direction of the magnetic force acting on the electron? b) What is the radius of the electron's circular trajectory in this magnetic field? c) What is the period of the electron's circular motion? d) What is the direction of the electron's circular motion (is the electron moving clockwise or counter-clockwise) when viewed from above the page? e) What are the magnitude and direction of the electric field that must be applied if the electron is to move through this region undeflected?
Transcribed Image Text:21. An electron (q = -1.60 × 1019 C, me = 9.11 x 10–31 kg) with an instantaneous velocity v = 1.50 x 106 m/s in the +y direction is moving through a region of constant magnetic field with B = 0.250 T (directed into the page) as shown in the figure. L. y V a) What are the magnitude and direction of the magnetic force acting on the electron? b) What is the radius of the electron's circular trajectory in this magnetic field? c) What is the period of the electron's circular motion? d) What is the direction of the electron's circular motion (is the electron moving clockwise or counter-clockwise) when viewed from above the page? e) What are the magnitude and direction of the electric field that must be applied if the electron is to move through this region undeflected?
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