To test a capacitor with a multimeter, discharge the capacitor, set the multimeter to test for resistance then interpret the reading. There are other testing methods other than resistance that can be used. Since capacito... More » Science Physics Electricity

A run capacitor is an electrical capacitor that energizes the auxiliary coil of an alternating current electronic motor, creating a rotating magnetic field while the motor runs. Run capacitors are sometimes used in singl... More » Vehicles Car Parts & Maintenance

To test the capacitor on a home air conditioning unit, shut off the power supply, discharge the unit and obtain the reading. If the reading is more than about six percent lower than the known rating, it is time to replac... More » Home & Garden Heating & Cooling
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A series combination of capacitors is reduced to a single capacitor by adding the sum of the inverses of each individual capacitor, then inverting that. The equation is C_eq = (1 / ((1 / C1) + (1 / C2) + (1 / C3) + ... +... More » Science Physics Electricity

The purpose of a capacitor is to store energy in the electric field between a pair of closely spaced conductors that are called plates, and these capacitors are used in electrical circuits as energy-storage devices. Capa... More » Science Physics Electricity

The RC time constant is the product of the resistance and capacitance of a circuit, or R x C. It is used to describe the rate of charging when a battery is connected to a resistor and capacitor in series. RC circuits can... More » Science Physics Electricity

To test a transformer, obtain an oscillator and multimeter, sync the measuring devices, and connect the oscillator to the transformer to display a voltage reading. Equipped with the multimeter, use the oscillator to test... More » Science Physics Electricity