A-LevelPhysicsOscillationsMay/June 2018Paper 1 Q281 Mark
The diagram shows a stationary wave, at time t = 0, that has been set up on a string fixed between points P and S. [Diagram] The nodes of the stationary wave occur on the string at P, Q, R and S. Point X is moving down at time t = 0. The points on the string vibrate with time period T and maximum amplitude 2 cm. The displacement s is positive in the upward direction. Which graph best shows the variation with t of the displacement s of point Y on the string?
AGraph of displacement s vs time t, starting at 0, decreasing to negative maximum at T/4, returning to 0 at T/2, increasing to positive maximum at 3T/4, returning to 0 at T.
BGraph of displacement s vs time t, starting at 0, increasing to positive maximum at T/4, returning to 0 at T/2, decreasing to negative maximum at 3T/4, returning to 0 at T.
CGraph of displacement s vs time t, starting at 0, decreasing to negative maximum at T/2, returning to 0 at T.
DGraph of displacement s vs time t, starting at 0, increasing to positive maximum at T/2, returning to 0 at T.
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of oscillations 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep