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AP Physics 2 MCQs

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AP Physics 2 practice questions by unit

Fiveable has 13,526 AP Physics 2 multiple-choice practice questions across 7 units, plus 96 stimulus-based question sets built around a source. Practice one unit or topic at a time.

  • Unit 9 – Thermodynamics: 1,854 multiple-choice questions, 10 stimulus sets
  • Unit 10 – Electric Force, Field, and Potential: 2,094 multiple-choice questions, 11 stimulus sets
  • Unit 11 – Electric Circuits: 2,146 multiple-choice questions, 16 stimulus sets
  • Unit 12 – Magnetism and Electromagnetism: 1,464 multiple-choice questions, 6 stimulus sets
  • Unit 13 – Geometric Optics: 1,196 multiple-choice questions, 8 stimulus sets
  • Unit 14 – Waves, Sound, and Physical Optics: 2,417 multiple-choice questions, 22 stimulus sets
  • Unit 15 – Modern Physics: 2,355 multiple-choice questions, 23 stimulus sets

Sample AP Physics 2 practice question

A laser beam is vertically polarized with average power P_avg and cross-sectional area A. It passes through a polarizing sheet with a transmission axis at an angle φ to the vertical. Which expression represents the transmitted intensity I_t?

I_t = (P_avg/A) cos²φ

Correct answer

I_t = (P_avg/2A) cos²φ

I_t = (P_avg/A) sin²φ

I_t = (P_avg/A) cosφ

Explanation

Deriving the intensity requires defining initial intensity as Power/Area and then applying Malus's Law. Since the incident light is already polarized, the transmitted intensity is the initial intensity multiplied by the square of the cosine of the angle.

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