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This question is about static electricity - Edexcel - GCSE Physics - Question 1 - 2022 - Paper 1
Question 1
This question is about static electricity. (a) Draw on Figure 1 the shape and direction of the electric field due to the positive point charge. (b) A student rubs ... show full transcript
Worked Solution & Example Answer:This question is about static electricity - Edexcel - GCSE Physics - Question 1 - 2022 - Paper 1
Step 1
Draw on Figure 1 the shape and direction of the electric field due to the positive point charge.
Answer
To indicate the electric field, draw at least three straight radial lines emanating from the positive point charge depicted in Figure 1. Ensure that the lines extend outward, showing the direction of the electric field, which points away from the charge.
Step 2
Explain how the ruler becomes positively charged.
Answer
The plastic ruler becomes positively charged through the process of friction. When the ruler is rubbed against the woolly jumper, electrons (which carry a negative charge) are transferred from the ruler to the jumper. As a result, the ruler loses some of its negative charges, leading to an excess of positive charge on the ruler, which is why it is found to be positively charged afterward.