Elektrische Spannung und deren Messung Innenwiderstand des Voltmeters Elektrotechnik

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Basics of single-pole and two-pole voltage measurement and their dangers. Why is the voltmeter's internal resistance high? Why is single pole measurement so dangerous? What are the dangers of two-pole measurement? • 00:00 voltage as potential difference • 1:43 tension only between 2 points • 02:11 Voltage is measured in parallel • 03:08 Unproblematic measurement at the socket • 04:22 Problematic two-pole measurement • 06:23 Single pole voltage measurement • 08:22 Wrong unipolar measurement / lying pen • 10:20 Contactless voltage measurement • 11:14 Why a high internal resistance? (1) • 13:50 Why a high internal resistance? (2) • 14:34 Conclusion

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