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IB Physics HL C.1.8 Phase Angle Question Bank

Practise IB Physics HL C.1.8 by converting phase separation into radians, identifying lead or lag, and sketching shifted SHM curves.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Convert path or time separation into phase angle using wavelength or period evidence.
  • Identify which oscillator leads or lags and quantify the shift in radians or degrees.
  • Sketch a phase-shifted acceleration or displacement curve with unchanged period and amplitude.

C.1.8 (HL)—Phase angle question 1

[Maximum number: 2]

A mass is attached to a vertical spring. The other end of the spring is attached to the driver of an oscillator.

Figure for Question C.1.8 (HL)—Phase angle question 1 — IB Physics HL

The mass is performing very lightly damped harmonic oscillations. The frequency of the driver is higher than the natural frequency of the system. At one instant the driver is moving downwards.

State and explain the direction of motion of the mass at this instant.

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