REVIEW: Magnetic Field

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Presentation transcript:

REVIEW: Magnetic Field Review Questions March 6, 2012

Question 1 2 This graphic shows the earth’s magnetic field is as if it has a magnet inside. Is the diagram correct? (a) yes (b) no The field lines are backwards! The magnetic field should point towards the geographic north pole

Question 2 At the north pole of the earth 3 At the north pole of the earth (a) its a south pole of a magnet (b) its a north pole of a magnet (c) the magnetic field points straight up (d) the magnetic field points parallel to surface of earth (e) none of these

Question 3 4 Which one is Michael Faraday?

5 Question 4 If vector “a” points down, and vector “b” points to the front of the room, what direction does “ab” point? (a) up (b) left (c) right (d) down (e) none of these RIGHT HAND RULE

Question 5 The SI units of magnetic field are: (a) Gauss (b) Webers 6 Question 5 The SI units of magnetic field are: (a) Gauss (b) Webers (c) emu (electromagnetic unit) (d) Tesla (e) pole strength

Question 6 The formal definition of north pole of a magnet 7 The formal definition of north pole of a magnet (a) magnetic field emanates from it (b) magnetic field points into it (c) the “north seeking” end of a magnet (d) the positive pole strength of a dipole (e) none of these