IB Physics Phase Difference

/

A tutorial sheet on phase difference is given below.

  1. What does the term "in phase" mean?
  2. What does the term "180 degrees out of phase" mean?
  3. How do we define phase difference?
  4. Are points on a progressive wave all in phase?
  5. A progressive wave has a wavelength of 1.0 m. What is the phase difference between two points on the wave that are 0.8 m apart?
  6. Are points on a standing wave on a string all in phase?
  7. The wavelength of the standing wave on a string is 1.0 m. What is the phase difference between two points on the string that are 0.8 m apart?
  8. In an AC transformer are the primary and secondary voltages in phase?
  9. In an AC transformer are the primary and secondary currents in phase?
  10. For application to transformer problems see S J Osmond, Physics Education, vol 17, no 5, Sep 1982 p236