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AP Physics 2 MCQs

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AP Physics 2 practice questions by unit

Fiveable has 8,056 AP Physics 2 multiple-choice practice questions across 7 units, plus 88 stimulus-based question sets built around a source. Practice one unit or topic at a time.

  • Unit 9 – Thermodynamics: 1,169 multiple-choice questions, 9 stimulus sets
  • Unit 10 – Electric Force, Field, and Potential: 1,391 multiple-choice questions, 11 stimulus sets
  • Unit 11 – Electric Circuits: 1,397 multiple-choice questions, 16 stimulus sets
  • Unit 12 – Magnetism and Electromagnetism: 842 multiple-choice questions, 6 stimulus sets
  • Unit 13 – Geometric Optics: 618 multiple-choice questions, 7 stimulus sets
  • Unit 14 – Waves, Sound, and Physical Optics: 1,301 multiple-choice questions, 18 stimulus sets
  • Unit 15 – Modern Physics: 1,338 multiple-choice questions, 21 stimulus sets

Sample AP Physics 2 practice question

Consider the ground state (n=1) of a hydrogen atom (Z=1) and the ground state (n=1) of a singly ionized helium atom (Z=2). How does the ionization energy of the helium ion compare to the ionization energy of the hydrogen atom?

The helium ionization energy is four times that of hydrogen.

Correct answer

The helium ionization energy is two times that of hydrogen.

The helium ionization energy is one-half that of hydrogen.

The helium ionization energy is one-fourth that of hydrogen.

Explanation

Comparing ionization energies requires applying the Bohr energy formula E∝Z²/n². Since both atoms are in the ground state (n=1), the energy depends only on the square of the atomic number (Z), resulting in a factor of 2²=4.

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