(II) Electrocardiographs are often connected as shown in Fig. 19–68. The lead wires to the legs are said to be capac- itively coupled. A time constant of 3.0 s is typical and allows rapid changes in potential to be recorded accurately. If C = 3.0 µF, what value must R have? [Hint: Consider each leg as a separate circuit.] - To left-leg C electrode R Recorder - To right-leg electrode (ground) R C GURE 19-68 ·To arm electrode oblem 53. Amplifier

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(II) Electrocardiographs are often connected as shown in
Fig. 19–68. The lead wires to the legs are said to be capac-
itively coupled. A time constant of 3.0 s is typical and
allows rapid changes in potential to be recorded accurately.
If C = 3.0 µF, what value must R have? [Hint: Consider
each leg as a separate circuit.]
- To left-leg
C
electrode
R
Recorder -
To right-leg
electrode
(ground)
R
C
GURE 19-68
·To arm electrode
oblem 53.
Amplifier
Transcribed Image Text:(II) Electrocardiographs are often connected as shown in Fig. 19–68. The lead wires to the legs are said to be capac- itively coupled. A time constant of 3.0 s is typical and allows rapid changes in potential to be recorded accurately. If C = 3.0 µF, what value must R have? [Hint: Consider each leg as a separate circuit.] - To left-leg C electrode R Recorder - To right-leg electrode (ground) R C GURE 19-68 ·To arm electrode oblem 53. Amplifier
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