An Electron Moves with a Speed Of $8.0 \times 10 ^ { 6 } \mathrm {~m} / \mathrm { s }$

question 99

Multiple Choice

An electron moves with a speed of $8.0 \times 10 ^ { 6 } \mathrm {~m} / \mathrm { s }$ along the $+ x$ -axis. It enters a region where there is a magnetic field of $2.5 \mathrm {~T}$ , directed at an angle of $60 ^ { \circ }$ to the $+ x$ -axis and lying in the $x y$ -plane.
Calculate the magnitude of the magnetic force on the electron. $\left( e = 1.60 \times 10 ^ { - 19 } \mathrm { C } \right)$

• A) \(3.2 \times 10 ^ { - 12 } \mathrm {~N}\)
• B) \(0 \mathrm {~N}\)
• C) \(3.2 \times 10 ^ { - 10 } \mathrm {~N}\)
• D) \(2.8 \times 10 ^ { - 12 } \mathrm {~N}\)
• E) \(2.8 \times 10 ^ { - 10 } \mathrm {~N}\)

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Definitions:

Light Energy

The form of energy visible to the human eye that is produced by the movement of photons and is essential to processes like photosynthesis.

Electromagnetic Waves

Waves of electromagnetic energy, including light, radio waves, and X-rays, that can travel through a vacuum.

Shortest Wavelength

Refers to the electromagnetic wave with the highest frequency and energy, which is typically part of the gamma rays in the electromagnetic spectrum.

Ultraviolet

A form of electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays, capable of causing chemical reactions and physical harm to living tissues.