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An electric field acts into the plane of the paper - AQA - A-Level Physics - Question 16 - 2019 - Paper 2
Question 16
An electric field acts into the plane of the paper. An electron enters the field at 90° to the field lines. The force on the electron is A. zero. B. along the dir... show full transcript
Worked Solution & Example Answer:An electric field acts into the plane of the paper - AQA - A-Level Physics - Question 16 - 2019 - Paper 2
Step 1
The force on the electron is
Answer
When an electron enters an electric field at 90° to the field lines, the force it experiences is defined by the equation:
where is the force, is the charge of the electron (which is negative), and is the electric field strength. The force is directed opposite to the direction of the electric field due to the negative charge of the electron. Therefore, the correct answer is:
D. opposite to the direction of the field.