A Beam of Electrons Is Accelerated Through a Potential Difference

question 5

Multiple Choice

A beam of electrons is accelerated through a potential difference of 10 kV before entering a region having uniform electric and magnetic fields that are perpendicular to each other and perpendicular to the direction in which the electron is moving.If the magnetic field in this region has a value of 0.010 T,what magnitude of the electric field is required if the particles are to be undeflected as they pass through the region?

• A) 2.3 × 10³ V/m
• B) 7.9 × 10³ V/m
• C) 5.9 × 10⁵ V/m
• D) 6.0 × 10⁵ V/m
• E) 7.2 × 10⁶ V/m

---

Definitions:

Night Terrors

Intense episodes of fear that occur during sleep, typically in children, characterized by screaming, sweating, and confusion but little or no recall of the event upon awakening.

Nightmares

Disturbing dreams that can cause feelings of fear, terror, or anxiety, often awakening the sleeper.

Nicotine

The active ingredient in tobacco.

Stimulant

A substance that raises levels of physiological or nervous activity in the body, often used to increase alertness, attention, and energy.