hw8sol - Magnetic Field and Magnetic Forces27-1 27 Magnetic...

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27 Magnetic Field and Magnetic Forces 27- 1 Magnetic Field and Magnetic Forces 27.8. I DENTIFY and S ET U P : E XECUTE : (a) Set the expression for equal to the given value of to obtain: (b) does not contribute to the force, so is not determined by a measurement of . (c) E VALUATE : The force is perpendicular to both and , so is also zero. 27.13. I DENTIFY : The total flux through the bottle is zero because it is a closed surface. S ET U P : The total flux through the bottle is the flux through the plastic plus the flux through the open cap, so the sum of these must be zero. E XECUTE : Substituting the numbers gives = – (1.75 T)π(0.0125 m) 2 cos 25° = –7.8 × 10 –4 Wb E VALUATE : It would be impossible to calculate the flux through the plastic directly because of the complicated shape of the bottle, but with a little thought we can find this flux through a simple calculation. 27.22. I DENTIFY : For motion in an arc of a circle, and the net force is radially inward, toward the center of the circle.
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27- 2 Chapter 27 S ET U P : The direction of the force is shown in Figure 27.22. The mass of a proton is . E
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This note was uploaded on 09/15/2009 for the course ECON 201 taught by Professor Shoonlai during the Summer '09 term at Miami University.

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hw8sol - Magnetic Field and Magnetic Forces27-1 27 Magnetic...

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