A-LevelPhysicsD.C. circuitsMay/June 2018Paper 1 Q331 Mark
Which graph shows the variation of voltage V with current I for a semiconductor diode?
AV-I graph showing sharp increase in V for positive I, and sharp decrease in V for negative I.
BV-I graph showing sharp increase in V for positive I (after a threshold), and V slightly negative and nearly constant for negative I.
CV-I graph showing sharp increase in V for negative I (after a threshold), and V slightly positive and nearly constant for positive I.
DV-I graph showing V positive and nearly constant for positive I, and V sharply decreasing for negative I (after a threshold).
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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