This site is maintained by Henry Welman, former provincial co-ordinator (2017-2022) for physical and technical sciences in the Free State, South Africa. Please read the disclaimer at the bottom of the posts.
Wednesday 28 September 2016
Gr 10 September Physical Science Control Test: Comments
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vraag 4.3 en 4.4 pla my. Ek het nou 'n ammeter in my klas gekoppel en dit is definitief dat die neg van die sel aan die neg van die ammeter gekoppel word. Dit maak X negatief.
Message from examiner/moderator: Teachers are allowed to exclude these questions from marking and subtract the three marks from the total of the paper. Brief explanation why: The issue is about the MEANING of the negative (black terminal) and positive (red connection) signs on the terminals of an ammeter. Do they indicate POLARITY of the ammeter as such, or do they merely show which one must be connected to the positive terminal of the cell and which one to the negative terminal of the cell. We know for sure that an ammeter must be connected in series, but the MEANING of the signs on the ammeter terminal could be reason for confusion.
Vraag 4.6. Volgens die antwoordreeks is 'n battery pap as al die chemiese energie van die battery aan die komponente in die stroombaan oorgedra is. Kan ons dit so regmerk?
Wanneer kry ons die memos?
ReplyDeleteGebruik die skakel wat ek ge-e-pos het om dit af te laai.
Deletevraag 4.3 en 4.4 pla my. Ek het nou 'n ammeter in my klas gekoppel en dit is definitief dat die neg van die sel aan die neg van die ammeter gekoppel word. Dit maak X negatief.
ReplyDeleteMessage from examiner/moderator: Teachers are allowed to exclude these questions from marking and subtract the three marks from the total of the paper. Brief explanation why: The issue is about the MEANING of the negative (black terminal) and positive (red connection) signs on the terminals of an ammeter. Do they indicate POLARITY of the ammeter as such, or do they merely show which one must be connected to the positive terminal of the cell and which one to the negative terminal of the cell. We know for sure that an ammeter must be connected in series, but the MEANING of the signs on the ammeter terminal could be reason for confusion.
DeleteVraag 7.3 is verkeerd. Die jodiedioon is geel en nie die bromiedioon nie.
ReplyDeleteJodied is korrek./Iodide is correct.
DeleteLet me just be more descriptive as the original question was asked in Afrikaans. The iodide ion is associated with the yellow.
DeleteVraag 4.6. Volgens die antwoordreeks is 'n battery pap as al die chemiese energie van die battery aan die komponente in die stroombaan oorgedra is. Kan ons dit so regmerk?
ReplyDelete100%; aanvaar so.
Delete