A Proton, with Mass 1 $2.3 \times 10 ^ { 4 } \mathrm {~m} / \mathrm { s }$

question 4

Short Answer

A proton, with mass 1.67 × 10^-27 kg and charge +1.6 × 10^-19 C, is sent with velocity $2.3 \times 10 ^ { 4 } \mathrm {~m} / \mathrm { s }$ in the +x direction into a region where there is a uniform electric field of magnitude $780 \mathrm {~V} / \mathrm { m }$ in the +y direction. What must be the magnitude and direction of the uniform magnetic field in the region if the proton is to pass through undeflected? Assume that the magnetic field has no x component and neglect gravitational effects.

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Definitions:

Top-Down Processing

An approach to perception that involves higher-level cognitive processes, such as expectations and previous knowledge, to interpret sensory information.

Müller-Lyer Illusion

A visual illusion in which two lines of the same length appear to be of different lengths because of the addition of inward or outward facing wings at the ends of the lines.

Poggendorf Illusion

A visual illusion that involves the misperception of the position of one part of a transversal line that has been interrupted by the contour of an intervening structure.