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  1. Practice problem

    The detector reports twice the glancing angle →

    Intermediate · Read graphs & measurements. What is the spacing d of the reflecting crystal planes?

  2. Practice problem

    The electricity bill includes losses →

    Intermediate · Find a missing quantity. Find its input power.

  3. Practice problem

    The far edge may never be reached →

    Advanced · Connect concepts. When does the particle first leave the strip?

  4. Practice problem

    The field inside a magnetized sphere →

    Advanced · Apply a principle. What is the internal H field along the applied-field direction?

  5. Practice problem

    The induced field opposes the change →

    Intermediate · Apply a principle. What is the signed current if counterclockwise is positive as seen by you?

  6. Practice problem

    The load sees less than the emf →

    Intermediate · Connect concepts. Find its terminal voltage.

  7. Practice problem

    The magnetic moment follows the coil normal →

    Intermediate · Connect concepts. What is the torque magnitude on the coil?

  8. Practice problem

    The magnetic part of a light wave →

    Intermediate · Apply a principle. Find its peak magnetic field.

  9. Practice problem

    The missing line has a threshold →

    Intermediate · Compare cases. What increase in accelerating voltage reaches that threshold?

  10. Practice problem

    The next resonance skips a harmonic →

    Intermediate · Compare cases. Find its next allowed resonance frequency.

  11. Practice problem

    The peak shifts as a body heats →

    Intermediate · Apply a principle. Find the peak wavelength of its spectral radiance per unit wavelength.

  12. Practice problem / FREE SAMPLE

    The resistor receives the remaining voltage →

    Intermediate · Connect concepts. Account for the diode voltage drop when applying the loop rule.

  13. Practice problem / FREE SAMPLE

    The ruler changes along with the specimen →

    Intermediate · Compare cases. A measurement compares two physical lengths, and both can change.

  14. Practice problem

    The same formula, a different uncertainty →

    Intermediate · Read graphs & measurements. Find the approximate relative standard uncertainty of R.

  15. Practice problem

    The same weight needs more volume →

    Intermediate · Compare cases. How much farther does it sink in the second liquid?

  16. Practice problem

    The shorter narrow segment can dominate →

    Advanced · Connect concepts. How much of the pressure drop occurs in tube B?

  17. Practice problem / FREE SAMPLE

    The stopping line reaches zero at the threshold →

    Intermediate · Read graphs & measurements. A measured slope and one point can identify a physical threshold.

  18. Practice problem

    The string does not read either weight →

    Intermediate · Find a missing quantity. Find the string tension.

  19. Practice problem

    The substrate changes which thickness reinforces reflection →

    Intermediate · Apply a principle. What is the smallest positive film thickness for a reflected phase maximum?

  20. Practice problem

    The two components share one clock →

    Intermediate · Apply a principle. Find its horizontal range.