If the Z-Component of the Magnetic Field of an Electromagnetic

question 42

Multiple Choice

If the z-component of the magnetic field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation B_z(x, t) = (1.25 μT) cos[(3800 m^-1) x - (1.14 × 10^-12 rad/s) t], what is the largest that the y component of the electric field can be? (c = 3.0 x 10⁸ m/s)

• A) 375 N/C
• B) 4.17 × 10^-15 N/C
• C) 3.75 × 10⁸ N/C
• D) 4.17 × 10^-9 N/C
• E) 1.25 × 10⁶ N/C

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