Acardiac defibrillator stores 1275 j of energy when it is charged to 5.6kv what is the capacitance? o 11.3 pf 96.1 pf o 813 f

Explanation:

The answer is not among the given options. However, this is a good example of the relation between the energy stored in a capacitor and its capacitance , which is given by the following equation:

  (1)

Where:

is the voltage

is the capacitance in Farads, the value we want to find

Isolating from (1):

  (2)

  (3)

Finally:

This is the capacitance of the cardiac defibrillator