A Uniform Magnetic Field of Magnitude 0

question 3

Multiple Choice

A uniform magnetic field of magnitude 0.80 T in the negative z-direction is present in a region of space, as shown in the figure. A uniform electric field is also present. An electron that is projected with an initial velocity v₀ = 9.1 × 10⁴ m/s in the positive x-direction passes through the region without deflection. What is the electric field vector in the region?

• A) -73 kV/m ĵ
• B) +73 kV/m î
• C) +110 kV/m î
• D) +110 kV/m ĵ
• E) -110 kV/m ĵ

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