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--- electrical_engineering_and_electronics_1:block02 [2025/09/28 15:34] – mexleadmin
+++ electrical_engineering_and_electronics_1:block02 [2025/10/02 21:00] (aktuell) – mexleadmin
@@ Zeile 3: / Zeile 3: @@
 ===== Learning objectives =====
 <callout>
+After this 90-minute block, you can
   * Define electric charge $Q$ and explain its quantization in multiples of the elementary charge $e$.
   * Distinguish positive and negative charges, their interactions, and typical carriers (electrons, ions).
@@ Zeile 11: / Zeile 12: @@
   * Distinguish potential reference (ground) and explain why only voltage differences are measurable.
 </callout>
+===== Preparation at Home =====
+Be aware, that EEE1 has 5 ECTS, i.e. an overall weekly load of about 8..10 hours (incl. our lecture in presence). \\
+So, preparation and follow-up shall take about 5..6 hours (incl. 1.5h tutorial, when you go there).
+  * Please read through the present chapter and write down anything you did not understand.
+  * I also gave some clips for more clarification under 'Embedded resources' (check the text above/below, sometimes only part of the clip is interesting).
+I would assume, that reading my text first and watching the clips second once clarifying is needed shall work best.
+For checking your understanding please do the following exercises:
+  * 1.5.1
 ===== 90-minute plan =====
@@ Zeile 149: / Zeile 163: @@
   * **Units:** $[U]=[W]/[Q]=1~{\rm J}/1~{\rm C}=1~{\rm V}$.
-  * **Reference:** We choose one node as potential zero (“ground”); only differences are meaningful. :contentReference[oaicite:13]{index=13}
+  * **Reference:** We choose one node as potential zero (“ground”); only differences are meaningful.
-  * **Examples:**
-    - Thermal noise $\sim \mu{\rm V}$
+<panel type="info" title="Typical voltage magnitudes">
-    - Microcontroller supply $1.8~{\rm V}$
+  * Thermal noise: $\sim \mu{\rm V}$
-    - Mains $230~{\rm V}$
+  * Microcontroller: supply $1.8~{\rm V}$ to  $5.0~{\rm V}$ (often given as ''1V8'' and ''5V0'' or in general as ''VCC'' or ''VDD'')
-    - Lightning $>10^6~{\rm V}$
+  * Mains: $230~{\rm V}$
+  * Lightning: $>10^6~{\rm V}$
+</panel>
 <panel type="info" title="Example / micro-exercise">
@@ Zeile 212: / Zeile 228: @@
 {{tagtopic>chapter1_2&nodate&nouser&noheader&nofooter&order=custom}}
+#@TaskTitle_HTML@#1.5.1 Direction of the voltage
+#@TaskText_HTML@#
+<WRAP>
+<imgcaption BildNr21 | Example of conventional voltage specification>
+</imgcaption>
+{{drawio>BeispKonventionelleSpannungsangabe.svg}}
+</WRAP>
+Explain whether the voltages $U_{\rm Batt}$, $U_{12}$ and $U_{21}$ in <imgref BildNr21> are positive or negative according to the voltage definition.
+#@HiddenBegin_HTML~1,Hints~@#
+  * Which terminal has the higher potential?
+  * From where to where does the arrow point?
+#@HiddenEnd_HTML~1,Hints~@#
+#@HiddenBegin_HTML~2,Result~@#
+  * ''+'' is the higher potential. Terminal 1 has the higher potential. $\varphi_1 > \varphi_2$
+  * For $U_{\rm Batt}$: The arrow starts at terminal 1 and ends at terminal 2. So $U_{\rm Batt}=U_{12}>0$
+  * $U_{21}<0$
+#@HiddenEnd_HTML~1l2,Result~@#
+#@TaskEnd_HTML@#
 <panel type="info" title="Task 2.1: Counting charges in a current">