O-LevelPhysicsElectricity5054/22 · May/June 2017 · Q85 Marks
Fig. 8.1 shows charges on a rod and on a cloth. [Figure 8.1]
- (a)State how Fig. 8.1 shows that the rod and the cloth are uncharged.[1]
- (b)(i)The plastic rod becomes negatively charged when rubbed by the cloth. Describe what happens to the charges on the rod and on the cloth during the charging process.[2]
- (b)(ii)Describe a simple experiment to show that the plastic rod is charged. You may draw a diagram if you wish.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.
- [1] equal (numbers of) positive and negative charges
- [1] negative charge moves from cloth to rod
- [1] electrons move from cloth to rod
- [1] apparatus needed, e.g. (small) pieces of paper / water stream / (gold leaf) electroscope / suspended or pivoted other charged rod / charged object / conducting object
- [1] correct statement of what is seen / felt with apparatus
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