Use the Diagram for the Next Three Problems

question 15

Multiple Choice

Use the diagram for the next three problems. Electrons traveling at a speed of v₀ = 3 * 10⁷ m/s pass through the deflection plates. The electric field between the plates is E = 5000 V/m and spans a distance of
x₁ = 5 cm. The electrons then travel a further distance of x₂ = 40 cm along the x-axis.
-In which direction should the magnetic field be applied so that the electron lands undeflected at a?

• A) 1
• B) 2
• C) 3
• D) 4
• E) 5

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