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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 hydrogen atom's electron transitions from the ground state (n=1) to the first excited state (n=2). Which statement correctly compares the electron's orbital speed in the n=2 state to its speed in the n=1 state?

The speed in the n=2 state is one-half the speed in the n=1 state.

Correct answer

The speed in the n=2 state is one-fourth the speed in the n=1 state.

The speed in the n=2 state is two times the speed in the n=1 state.

The speed in the n=2 state is four times the speed in the n=1 state.

Explanation

Comparing orbital speeds requires applying the Bohr quantization condition L=mvr=nℏ and the radius relationship r∝n². Substituting r∝n² into v∝1/r yields v∝1/n, meaning the speed at n=2 is half the speed at n=1.

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