题目内容
A capacitor is an electronic component consisting of a pair of conductors separated by a dielectric. A capacitor can store electrical charge in an electrical field.
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An inductor is an electronic component that can store energy in a magnetic field created by the electric current passing through it.
A transformer is an electrical component that converts AC electricity from one voltage to another with little loss of power. The input coil is called the primary winding and the output coil is called the secondary winding.
A transistor is a semiconductor device used to amplify electronic signals. The transistor amplifies current, and the amount of current amplification is called the current gain.
A bipolar junction transistor ( BJT ) has terminals labeled base, collector, and emitter. For a field-effect transistor ( FET ) , the terminals are labeled gate , source, and drain, and a voltage at the gate can control a current between source and drain.
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