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2 cards from this section. Quick, good the night before a test.
Where does the electric potential equal zero for two charges of equal magnitude and opposite sign?
Consider the concept of superposition.
What is the capacitance of a capacitor with charge of 4 μC and potential difference of 2 V?
Use the formula for capacitance.
What is the unit of capacitance?
Think about how capacitance is defined in terms of charge.
True or False: Electric potential is the same at all points in an equipotential surface.
Recall the characteristics of an equipotential surface.
A capacitor has a capacitance of 10 μF. If charged to 100 V, what is the stored energy? Then, if it is short-circuited, how much energy is dissipated?
Use the energy formula.
Calculate the potential at a point P located 4 cm from a charge of 5 × 10^-8 C, and 12 cm from a charge of -3 × 10^-8 C.
Use the principle of superposition.
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