Question

A 165 μF capacitor is used in a circuit.

How much energy, in joules, is stored in it when 117 V is applied?

&

A nervous physicist worries that the two metal shelves of his wood frame bookcase might obtain a high voltage difference if charged by static electricity, perhaps produced by friction.

What is the capacitance of the empty shelves if they have area 1.4 × 10³ cm² and are 0.22 m apart in F?

What is the potential difference between them if opposite charges of magnitude 2.00 nC are placed on them in V?

To show that this voltage poses a small hazard, calculate the energy stored in J.

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In open heart surgery, a small amount of energy is often used to defibrillate the heart.

What voltage, in kilovolts, is applied to the 8.5 μF capacitor of a heart defibrillator that stores 35 J of energy?

Find the amount of stored charge, in millicoulombs.

Answer 1

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