An electron moves with a speed of 8.0 × 106 m/s along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x axis and lying in the xy plane. Calculate the magnetic force of the electron.Group of answer choices2.8 × 10-12 N3.2 × 10-12 N2.8 × 10-10 N3.2 × 10-10 N
Question
An electron moves with a speed of 8.0 × 106 m/s along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x axis and lying in the xy plane. Calculate the magnetic force of the electron.Group of answer choices2.8 × 10-12 N3.2 × 10-12 N2.8 × 10-10 N3.2 × 10-10 N
Solution
Para calcular la fuerza magnética sobre el electrón, utilizamos la fórmula de la fuerza magnética:
donde:
- es la fuerza magnética,
- es la carga del electrón ( C),
- es la velocidad del electrón ( m/s),
- es la magnitud del campo magnético ( T),
- es el ángulo entre la velocidad del electrón y el campo magnético ().
Primero, calculamos el seno del ángulo:
Ahora, sustituimos los valores en la fórmula:
Calculamos paso a paso:
La magnitud de la fuerza es:
Por lo tanto, la respuesta correcta es:
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