Capacitors are important, as they store electric charge and contribute to resistors by way of timing circuits. Since it's so easy for capacitors to fill with an electric charge, they aid in smoothing the varying and sporadic direct current, or DC. Capacitors are also used in audio equipment couplings between audio systems and loudspeakers, as well as in filtering, tuning and storing energy. The ability to calculate resistance, both within a capacitor and within a circuit, is vital for electrical engineering, simple physics and audio/visual projects.
Instructions
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1
Group together variables for the following equation: Vc = V * (1- e^(-t / R*C). This equation can be used to calculate voltage, capacitance, resistance, time of charge and instantaneous voltage.
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2
Plug in your known variables, including the constant for e, which is 2.71828.
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3
Solve your equation for R, which represents "resistance."
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4
Double-check your answer with the online calculator for resistance, capacitance, voltage and time, which is listed under the References. This will guarantee that you have done your hand calculations correctly.