The immediate cause of many deaths is ventricularfibrillation, an uncoordinated quivering of the heart, asopposed to proper beating. An electric shock to the chest cancause momentary paralysis of the heart muscle, after whichthe heart will sometimes start organized beating again. Adefibrillator is a device that applies a strong electric shock tothe chest over a time of a few milliseconds. The device containsa capacitor of a few microfarads, charged to several thousandvolts. Electrodes called paddles, about 8 cm across andcoated with conducting paste, are held against the chest onboth sides of the heart. Their handles are insulated to preventinjury to the operator, who calls “Clear!” and pushes abutton on one paddle to discharge the capacitor through thepatient’s chest. Assume an energy of 3.00 x 102 W ? s is to bedelivered from a 30.0 - µF capacitor. To what potential differencemust it be charged?
The immediate cause of many deaths is ventricular
fibrillation, an uncoordinated quivering of the heart, as
opposed to proper beating. An electric shock to the chest can
cause momentary paralysis of the heart muscle, after which
the heart will sometimes start organized beating again. A
defibrillator is a device that applies a strong electric shock to
the chest over a time of a few milliseconds. The device contains
a capacitor of a few microfarads, charged to several thousand
volts. Electrodes called paddles, about 8 cm across and
coated with
both sides of the heart. Their handles are insulated to prevent
injury to the operator, who calls “Clear!” and pushes a
button on one paddle to discharge the capacitor through the
patient’s chest. Assume an energy of 3.00 x 102 W ? s is to be
delivered from a 30.0 - µF capacitor. To what potential difference
must it be charged?
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