# Devry phys320 -discussions week 1 to week 7

Open ActivPhysics Tutorial 15.9, “Thin Lens Ray Diagrams.” Complete Questions 1–7 in the tutorial and use what you have learned to answer the following questions.

Which object-image positions are most like that of a camera?Which object-image positions are most like that of a slide projector?Which object-image positions are most like that of a magnifying glass?

What did you learn from the experiments that you did during Week 2?

Week 4

Open ActivPhysics Tutorial 11.9, “Motion of a Charge in an Electric Field.” Complete Questions 1–5 in the tutorial and use what you have learned to answer the following questions: Reset the simulation and return the x-component of velocity to +5.0 x 106 m/s. Now, if you increase the electric field from +2.0 kV/m (+2.0 kN/C) to +4.0 kV/m, how does that affect: (a) the electron’s acceleration in the x direction; (b) the electron’s acceleration in the y direction (how can you test this?); and (c) the time of flight?

What did you learn from the experiment that you did during Week 3?

Week 5

The Effects of Magnetic Fields (graded)

What is the Hall effect? What are its applications?

What did you learn from the experiments that you did during Week 5?

Week 6

The Effects of Magnetic Fields (graded)

What is the Hall effect? What are its applications?

What did you learn from the experiments that you did during Week 5?

Week 7

Open ActivPhysics Tutorial 17.3, “Electric Potential, Field and Force.” Complete Questions 1–10 in the tutorial and use what you have learned to answer the following questions.
What happens to the stopping potential and photocurrent if the frequency of the incident light is changed to ultraviolet? To blue?

What did you learn from the experiments that you did during Week 6?

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