Chapter29_clicker_questions

# Chapter29_clicker_questions - Clicker question loop in B...

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10/28/2011 Physics for Scientists & Engineers 2, Lecture 26 44 Clicker question: loop in B field A conducting loop is above a magnet with the axis of the loop parallel to that of the magnet. The loop is released and falls downward. What is the direction of the current as viewed from above. A. clockwise B. counter-clockwise C. there is no current D. there is insufficient information N S

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10/28/2011 Physics for Scientists & Engineers 2, Lecture 26 45 Clicker question: loop in B field (2) As the loop falls downward, does the induced current slow or speed up the fall compared to the case of no magnet? A. Slow down B. Speed up C. No change D. There is insufficient information N S
October 28, 2011 Physics for Scientists & Engineers, Chapter 22 46 Clicker quiz: Flux The lines in the figure are electric field lines, and the circle is a Gaussian surface. For which cases is the total flux non-zero? A: only a B: a, b, and f C: a, b, e, and f D: a, b, d, e, and h E: None of the above

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10/28/2011 Physics for Scientists & Engineers 2, Lecture 26 47 Clicker question: magnetic flux A sphere of radius R is placed near a long, straight wire that carries a steady current I. The magnetic field generated by the current is B. The total magnetic flux passing through the sphere is A) m o I. B) I /(4 p R 2 ). C) 4 2 D) zero. E) need more information Magnetic field lines close on themselves, the total magnetic flux through any closed surface is always zero.
10/28/2011 Physics for Scientists & Engineers 2, Lecture 26 48 Clicker question: loop in B field Consider a conducting loop initially with no current. A magnet is brought towards or away from the loop. At the moment shown, which direction(s) of magnet motion will produce a counter-clockwise current (as viewed from above)?

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Chapter29_clicker_questions - Clicker question loop in B...

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