Common Exam II – Monday October 31 4-5:30pm. Exam will cover Chapters 24, 25, 26, 27, and 28.1-3. Multi-loop Kirchhoff circuits and RC circuits (last week’s.

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Presentation transcript:

Common Exam II – Monday October :30pm. Exam will cover Chapters 24, 25, 26, 27, and Multi-loop Kirchhoff circuits and RC circuits (last week’s material) and Magnetic fields (this week’s material) will NOT be on Common Exam II.

Most of us are familiar with permanent magnets. Small magnetic material such as found in compass can indicate local direction of magnetic field Simple Bar magnets have a “north” and “south” pole analogous to magnetic field of the earth

Magnetic axis of earth is DIFFERENT than rotation axis (north geographic axis) of earth. Why is the north pole of magnet at the south pole?

Force of Magnetic Field (B) on a charged particle Vector Cross Product follows Right hand rule.

Clicker Question #1 What is direction of the force on a negatively charged particle for the B field shown in the figure A) Out of the page B) Into the page C) down D) up E) None of the above A B C B v

Clicker Question #2 What is direction of the magnetic field such that the path of a POSITIVELY charged particle is as shown in the figure A) Out of the page B) Into the page C) down D) up E) None of the above A B C v B? - +

Clicker Question #3 How would the D position of the particle change if the velocity of the particle increased? If the mass of the particle increased? A) increase, increase B) increase, decrease C) decrease, increase D) decrease, decrease E) None of the above A B C v B D

Clicker Question # 4 The magnetic field is constant and coming out of the page. What would be the direction of the force of the current carrying wire below? A) Upward B) downward C) Left D) Out of page E) None of the above A B C B I

Clicker Question # 5 The magnetic field is constant and coming out of the page. What would be the direction of the force of the current carrying wire below? A) Upward B) downward C) Left D) Out of page E) None of the above A B C B I