1. Electrons move along a circular and straight path in an area where a uniform magnetic field 가 exists in the direction from the ground, as shown in the figure. The radius of the circular path is 이고 and the length of the straight path is 이. A parallel charging plate with an interval of 인 is installed in the straight path, and a uniform electric field is formed between the charging plates. The electron has a mass of , and a charge of -이다.
(a) Find the direction of the electric field between the equilibrium counterparts at the top of the figure and the potential difference between the counterparts.
(b) Find the time 를 it took for an electron to move along the path and return to its original position.
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L B. d r
L B. d r
L B. d r
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