Associated Locksmiths of America (ALOA) Practice Test 2026 – Your Comprehensive All-in-One Guide to Exam Excellence!

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What is the primary function of a rectifier?

To increase voltage for electrical devices

To convert direct current to alternating current

To change alternating current to direct current

A rectifier's primary function is to change alternating current (AC) to direct current (DC). This process is crucial in various applications where DC is required, such as in battery charging and powering electronic devices.

When AC is provided by power sources, such as electrical outlets, it oscillates and changes direction periodically. Many electronic circuits and devices require a steady, unidirectional flow of current, which is where rectifiers come into play. They utilize components like diodes to allow current to flow only in one direction, effectively blocking the reverse flow and thus converting AC into DC.

In contrast, the options that mention increasing voltage or converting DC to AC do not reflect the primary role of a rectifier. Additionally, while storing energy is an important function in electrical systems, that is typically the role of capacitors or batteries rather than rectifiers.

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To store energy for later use

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