The Apparatus in the Figure Consists of Two Parallel Plates

question 41

Multiple Choice

The apparatus in the figure consists of two parallel plates shown on edge) and a large magnet not shown) . The field of the magnet is uniform, perpendicular to the electric field between the plates, and directed into the plane of the paper. The magnitude of B is 0.40 T. Charged particles with speeds of 5.0 × 10⁵ m/s enter this region through the slit at the left and emerge through the exit slit at the right. What magnitude and direction must the E field have so that positively charged particles entering from the left will traverse to the exit slit undeviated?

• A) 2.0 × 10⁵ V/m up
• B) 2.0 × 10⁵ V/m down
• C) 1.2 × 10⁶ V/m down
• D) 1.2 × 10⁶ V/m up
• E) 2.4 × 10⁶ V/m down

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Definitions:

Maxilla

The upper jawbone, forming the upper mouth section, the floors of the orbits, and sides of the nasal cavity.

Orbicularis Oculi

The orbicularis oculi is a circular muscle surrounding the eye that allows for blinking and squinting.

Orbicularis Oris

A complex of muscles in the lips that encircles the mouth, enabling movements involved in speech and facial expressions.

Nasalis

A facial muscle responsible for the compression of the nasal cartilage.