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Basic Electrical Training 3

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Mit welcher Schaltung lässt sich typischerweise eine virtuelle Masse erzeugen, wenn nur eine einzelne Versorgungsspannung (z.B. +5 V) zur Verfügung steht und man einen Mittelpunkt (0 V-Referenz) benötigt? / Which circuit can typically be used to generate a virtual ground if only a single supply voltage (e.g. +5 V) is available and a centre point (0 V reference) is required?

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In einer invertierenden Grundbeschaltung liegt der nicht-invertierende Eingang ( +-Eingang ) auf Masse, während der invertierende Eingang ( −-Eingang ) über einen Widerstand mit dem Eingangssignal verbunden ist. Warum nennt man den −−-Eingang in dieser Schaltung oft „virtuellen Nullpunkt“? / In an inverting basic circuit, the non-inverting input ( + input ) is connected to ground, while the inverting input ( -  input ) is connected to the input signal via a resistor. Why is the -input in this circuit often called ‘virtual zero’ or 'virtual ground'?

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Which of the following scenarios during soldering leads to early bonding phase and inadequate contact?

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Was ist der Zweck des Flussmittels im Lötzinn? / What is the purpose of flux in solder?

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Why are lead-free solders preferred in modern applications?

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Welche der folgenden Aussagen trifft auf "kalte Lötstellen" zu? / Which of the following statements is true about "cold solder joints"?

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Which polarity is correct for a diode in forward direction?

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Warum wird Schweißen in der Elektronik nicht verwendet? / Why is welding not used in electronics?

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Which of the following statements regarding soldering temperature and time is correct?

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Ordnen Sie den Verfahren die Temperaturbereiche zu. / Assign the temperature ranges to the procedures.

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