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# Exam3 - smith(js55595 – exam#3 – Sharma –(20715 1...

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Unformatted text preview: smith (js55595) – exam#3 – Sharma – (20715) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 3) 10.0 points A plane electromagnetic sinusoidal wave of frequency 13 . 3 MHz travels in free space. The speed of light is 2 . 99792 × 10 8 m / s. Determine the wavelength of the wave. Correct answer: 22 . 5408 m. Explanation: Let : c = 2 . 99792 × 10 8 m / s , and f = 13 . 3 MHz = 1 . 33 × 10 7 Hz . The speed of light is c = λ f λ = c f = 2 . 99792 × 10 8 m / s 1 . 33 × 10 7 Hz = 22 . 5408 m . 002 (part 2 of 3) 10.0 points Find the period of the wave. Correct answer: 7 . 5188 × 10- 8 s. Explanation: The period T of the wave is the inverse of the frequency: T = 1 f = 1 1 . 33 × 10 7 Hz = 7 . 5188 × 10- 8 s . 003 (part 3 of 3) 10.0 points At some point and some instant, the electric field has has a value of 958 N / C. Calculate the magnitude of the magnetic field at this point and this instant....
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Exam3 - smith(js55595 – exam#3 – Sharma –(20715 1...

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