physics education assessment hsc education-course-material

HSC Physics Physics Assessment 3 Ideas to Implementation HSC Physics Contribution: 20% Due: 5 June 2006 Maximum Marks: 30 Description of Task Complete questions related to the Ideas to Implementation module. Write answers clearly on A4 paper and staple to this assessment outline. Outcomes assessed: H7, H9, H10, H13, H14 Questions 1. Explain how Plank’s hypothesis for black body radiation solved the ultraviolet catastrophe. [4] 2. Outline the use of the photoelectric effect in solar cells and photocells. [4] 3. Justify the use of transistors rather than thermionic devices in modern technology. [4] 4. List two doping elements to create an n-type semiconductor and two doping elements to create ptype semiconductors made from silicon. [2] 5. An X-ray photon has a wavelength of 4.5 x 10-11 m a. Calculate its energy [2] b. Calculate how many photons are there in an energy of 50 x 10-17 J [2] 6. Calculate the force due to gravity acting on a photon with a wavelength of 644 nm travelling at 2 m above the Earth’s surface. [4] 7. A pair of parallel plates are 5 cm apart and a potential difference of 200 V is applied across them. a. Calculate the magnitude and direction of the electric field between the plates. [2] b. Calculate the force on an electron between the plates. [2] 8. An electron is travelling at right angles to a magnetic field of flux density 0.82 T with a velocity of 1.9 x 106 m/s. a. Calculate the force experienced by the particle. [2] b. Calculate the acceleration experienced by the particle. [2] R Laugesen 17/10/2008