
AQA A-level Physics Turning Points lesson on the specific charge of the electron. 13 editable slides, 29-mark worksheet, mark scheme and PDFs.
What’s in the PowerPoint
• A fields recap starter, with answers in the speaker notes
• The fine beam tube, with a diagram
• Deriving e/m = 2V/B²r² step by step
• A worked fine beam tube example
• The crossed fields method, and comparing e/m with the proton
• A common mistakes slide
• Six check questions with answers, and an exit ticket
• Teacher notes on every slide: textbook pages, spec references, misconceptions and demo ideas
What’s in the worksheet (29 marks)
• Recall of specific charge and the fine beam tube
• e/m and beam radius calculations
• The e/m derivation and a crossed fields question
• A 6-mark extended answer on the method
• A full mark scheme with mark points, on separate pages
• PDF copies of the slides, the student worksheet (no answers) and the mark scheme, ready to print
Good for
First teaching, revision, homework, cover lessons or independent study. The PowerPoint and Word files are fully editable, and the PDFs are ready to print or share with students.
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