A student rubs an acetate rod with a cloth - AQA - GCSE Physics - Question 6 - 2018 - Paper 1
Question 6
A student rubs an acetate rod with a cloth.
Figure 8 shows the charges on the acetate rod and cloth before and after rubbing.
Explain how rubbing an acetate rod wi... show full transcript
Worked Solution & Example Answer:A student rubs an acetate rod with a cloth - AQA - GCSE Physics - Question 6 - 2018 - Paper 1
Step 1
Explain how rubbing an acetate rod with a cloth causes the rod and cloth to become charged.
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Answer
Rubbing an acetate rod with a cloth creates friction, which causes electrons to move from the acetate rod to the cloth. As a result, the cloth gains extra electrons and becomes negatively charged, while the acetate rod loses electrons, becoming positively charged.
Step 2
Which statement is correct?
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Answer
There is a force of attraction between the acetate rod and the cloth.
Reason: The acetate rod and the cloth have opposite charges after rubbing, which causes an attractive force between them.
Step 3
The amount of charge on the metal dome is increased, which causes the potential difference between the metal dome and the earthed sphere to ________.
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Answer
increase
Step 4
Calculate the energy transferred by the spark.
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Answer
To calculate the energy transferred, we use the formula:
