A capacitor is a perfect insulator for A direct current B alternating current C rapidly fluctuating current D both for the direct and alternating current

Respuesta :

Answer:D) both for the direct and alternating current.

Explanation: A capacitor is a device designed to store and release electrical energy. It consists of two conductive plates separated by an insulating material, known as a dielectric.

For the given options:

A. Direct Current (DC): A capacitor can store electrical energy in a DC circuit by accumulating charge on its plates. However, once charged, it behaves like an open circuit to DC, effectively blocking the flow of direct current.

B. Alternating Current (AC): A capacitor can also work in an AC circuit. In an AC circuit, the voltage across the capacitor alternates, causing the capacitor to charge and discharge in synchronization with the alternating voltage.

C. Rapidly Fluctuating Current: This option is quite similar to AC, as rapidly fluctuating current typically refers to an AC signal. Capacitors are commonly used in circuits that handle rapidly changing signals, such as in radio frequency (RF) circuits or signal processing applications.

So, the correct answer is D) both for the direct and alternating current. Capacitors can function with both direct and alternating currents, albeit in different ways.

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