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Question
With each beat, the human heart generates a electromagnetic field, and the potential difference (voltage) oscillates over the course of each beat cycle. So, like an antenna, the human heart generates an electromagnetic wave. An electrocardiogram (EKG) is a medical diagnostic tool that measures the voltage (difference) between electrodes that are attached to different parts of your body, producing a chart that (hopefully) looks like the rhythmic pulses shown in figure. An EKG reveals that your heart is beating 72 times a minute, and that each beat generates a maximum potential difference, Vmax = 3.5-mV, across the 0.35-m width of your chest cavity. Use &o = 8.854 x 10-12 Nm²/C², Ho = 4 x 10-7 Tm/A, and c = 2.998 x 108 m/s.
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Transcribed Image Text:With each beat, the human heart generates a electromagnetic field, and the potential difference (voltage) oscillates over the course of each beat cycle. So, like an antenna, the human heart generates an electromagnetic wave. An electrocardiogram (EKG) is a medical diagnostic tool that measures the voltage (difference) between electrodes that are attached to different parts of your body, producing a chart that (hopefully) looks like the rhythmic pulses shown in figure. An EKG reveals that your heart is beating 72 times a minute, and that each beat generates a maximum potential difference, Vmax = 3.5-mV, across the 0.35-m width of your chest cavity. Use &o = 8.854 x 10-12 Nm²/C², Ho = 4 x 10-7 Tm/A, and c = 2.998 x 108 m/s.
Determine the following for the EM wave generated during each beat cycle of your heart. (a) Find the frequency and period of each heart beat. Hz f = T = S (b) Find the wavelength of the EM wave produced by your beating heart. λ = PopUp: Period and Frequency m (c) What is the peak strength of the electric field between the two electrodes? Emax = ]mV/m Erms Brms = (d) Determine the maximum strength of the corresponding magnetic field. Bmax = T (e) Calculate the rms average values of the electric and magnetic field strengths. mV/m T PopUp: RMS Averages
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Transcribed Image Text:Determine the following for the EM wave generated during each beat cycle of your heart. (a) Find the frequency and period of each heart beat. Hz f = T = S (b) Find the wavelength of the EM wave produced by your beating heart. λ = PopUp: Period and Frequency m (c) What is the peak strength of the electric field between the two electrodes? Emax = ]mV/m Erms Brms = (d) Determine the maximum strength of the corresponding magnetic field. Bmax = T (e) Calculate the rms average values of the electric and magnetic field strengths. mV/m T PopUp: RMS Averages
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