With a voltmeter, you can safely check the AC and DC voltage levels, measure resistance and even measure amperage or give circuit readings. What this means is that you can use this to diagnose problems that some of your household appliances might be having.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check our list of supported iPhone and iPad models, then follow our step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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