26) Three electrodes, 1-3, are attached to a patient as shown in Figure 21.26. D

Question

26) Three electrodes, 1-3, are attached to a patient as shown in Figure 21.26. During ventricular depolarization, across which pair of electrodes is the magnitude of the potential diffrence likely to be the smallest? Explain.

the 29. ve? FIGURE P21.25 3. 2e tntial diference betwen the elecrodes changes as he hartberts Rc va to 29 The potential difference between the electrodes changes as the heart beats FIGURE 21.29 The at- in ular Atrial depolarization Septal depolarization Ventricular depolarization Electrode 1 Electrode 2 s is dif- lest? 3. FIGURE P21.26 V2 is positive, V, negative. V2 is positive, Vi negative V2 is negative, Vi positive. pacitors onanitors re aluminum electrodes, spaced o a 100 V battery.

Explanation / Answer

Across electrodes 2 and 3 is the magnitude of the potential diffrence is the smallest . This is due to the electric lines of forces least between electrodes 2 and 3 .

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