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Glühlampe und Widerstand

About points...

We associate a certain number of points with each exercise.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.

That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.

About difficulty...

We associate a certain difficulty with each exercise.
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.

That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:

Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise

Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise

Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise

Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise

Level 5 -
Level 6 -

Exercise

https://texercises.com/exercise/gluhlampe-und-widerstand-1/

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Exercise:
Für eine Glühlampe die bei Stromstärken über pqmA durchbrennt steht eine Spannungsquelle mit der konstanten Spannung von pqV und ein Widerstand von pqOmega zur Verfügung. Schaltet man die Glühlampe und den Widerstand in Serie so leuchtet die Glühlampe und geht nicht kaputt. abcliste abc Wie stark dürfte die Spannungsquelle maximal sein damit die Glühlampe auch ohne Widerstand betrieben werden könnte? abc Könnte man die Glühlampe und den Widerstand auch parallel schalten ohne dass die Glühlampe kaputt geht? abcliste

Solution:
abcliste abc Über dem Widerstand fällt bei pqmA eine Spannung von U RI pqOmega pq.A pq.V ab. Über der Glühlampe also eine Restspannung von pq.V. abc Die Glühlampe hat einen Widerstand von R fracUI fracpq.Vpq.A pqOmega. Schaltet man sie mit dem Widerstand parallel so fallen über ihr die vollen pqV ab. Dabei fliessen mehr als pqmA nämlich pqmA durch sie. Dabei würde die Glühlampe durchbrennen. abcliste

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Nachprüfung 09/10 5d Gleichstromlehre by uz

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Attributes & Decorations

Tags	ersatzwiderstand, gleichstromlehre, glühlampe, ohm'sches, physik, widerstand
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Difficulty	(2, default)
Points	3 (default)
Language	(Deutsch)
Type	Both
Creator	uz
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