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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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i. A traveling
electromagnetic wave in a vacuum has an rms electric field amplitude of 59.7 V/m.Calculate the intensity S of this wave.
(a) 0 W/m2 (b) 3.15 W/m2 (c) 9.45 W/m2 (d) 18.9 W/m2
(e) None of the above.
ii. A circular, parallel plate capacitor in a DC RC circuit is charging. What is the direction of the Poynting vector between the capacitor plates?

Transcribed Image Text:i. A traveling electromagnetic wave in a vacuum has an rms electric field amplitude of 59.7 V/m.
Calculate the intensity S of this wave.
(a) 0 W/m²
(b) 3.15 W/m²
(c) 9.45 W/m²
(d) 18.9 W/m²
(e) None of the above.
ii. A circular, parallel plate capacitor in a DC RC circuit is charging. What is the direction of the
Poynting vector between the capacitor plates?
I(t)
00
I(t)
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- An incandescent light bulb emits only 2.6 W of its power as visible light. What is the rms electric field of the emitted light at a distance of 3.0 m from the bulb?arrow_forwardAn EM wave has a magnetic field strength of 5.00×10^−4 [T]. What is its electric field strength when travelling in a medium with n=1.50? A. 1.00×10^5[V/m] B. 1.50×10^5[V/m] C. 3.00×10^11[V/m] D. 6.00×10^11[V/m]arrow_forward13. A certain 60.0 Hz AC power line radiates an electromagnetic wave having a maximum electric field strength of 27.5 kV/m. (a) What is the wavelength of this very low frequency electromagnetic wave? m(b) What is its maximum magnetic field strength? Tarrow_forward
- Answer the following two bonus questions. a. The electric field in the EM wave is given by the following equation: E = 450sin(0.40z – 6.0 x 10°t)î, where E is N/C, z in meters and t in seconds. Determine the curl of the electric field (V X E). b. Use the divergence theorem to convert the Gauss' law from the integral form to the differential form.arrow_forwardAn electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that has dielectric constant 3.64 and relative permeability 5.18 at this frequency. The electric field has amplitude 7.20 × 10-³ V/m. Part A What is the speed of propagation of the wave? 17 ΑΣΦ V= Submit Request Answer Part B What is the wavelength of the wave? ΠΙ ΑΣΦ X = Submit Request Answer ? ? m/s marrow_forward5. Calculate the Poynting Vector inside an ideal coaxial cable. Show that the energy current in V² the cable (integral of the energy current density over a cross section) equals "Ideal" means Z that conductors have no resistance and dielectric has no conductance.arrow_forward
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