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PHY 206 Midterm: PHY 207 UMiami Spring08 3s

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turquoisegnu128
31 Jan 2019
School
University of Miami
Department
Physics
Course
PHY 206
Professor
All

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A conducting bar with length l and resistance r moves at constant speed v connected to vertical rails with zero resistance and negligible friction (see figure). Find the magnitude of the gravitational force pulling on the bar: calculate the rate of work (work/time) done by the gravitational force on the bar. Compare your result with what you found in part b). Write your results in terms of l, r, v, and i. where the negative sign is removed because the bar moves in the negative y direction (the area is reduced!). Therefore: if the acceleration is zero, the gravitational force is balanced by the magnetic one. _______________________________________________________________________: (cid:3003)(cid:3404)(cid:1828)(cid:4652)(cid:1318) (cid:1827)(cid:1318)(cid:3404)(cid:1828)(cid:1827)(cid:3404)(cid:1828)(cid:1838)(cid:1877), with (cid:1827)(cid:1318) directed into the board, and y being the vertical coordinate. (cid:1835)(cid:3404)(cid:2013)(cid:1844)(cid:3404)(cid:3398)1(cid:1844)(cid:1856) (cid:3003)(cid:1856)(cid:1872) (cid:3404)(cid:1828)(cid:1838)(cid:1874)(cid:1844) (cid:1828)(cid:3404)(cid:1835)(cid:1844)(cid:1838)(cid:1874) Into the board (it is positive, therefore parallel to (cid:1827)(cid:1318)): (cid:1842)(cid:3404)(cid:1835)(cid:2870)(cid:1844) (cid:1832)(cid:1318)(cid:3003)(cid:3404)(cid:1835)(cid:1838)(cid:4652)(cid:1318)(cid:3400)(cid:1828)(cid:4652)(cid:1318)(cid:3404)(cid:1835)(cid:1838)(cid:1835)(cid:1844)(cid:1838)(cid:1874)(cid:2836) (cid:3404)(cid:1835)(cid:2870)(cid:1844)(cid:1874) (cid:2836) (cid:1832)(cid:1318)(cid:3008)(cid:3404)(cid:3398)(cid:1832)(cid:1318)(cid:3003)(cid:3404)(cid:3398)(cid:1835)(cid:2870)(cid:1844)(cid:1874) (cid:2836) , (cid:1849)(cid:3404)(cid:1832)(cid:1318)(cid:3008) (cid:1856)(cid:1864)(cid:1318)(cid:3404)(cid:1832)(cid:1318)(cid:3008) (cid:1856)(cid:1877)(cid:1318)(cid:3404)(cid:3398)(cid:3010)(cid:3118)(cid:3019)(cid:3049) (cid:1856)(cid:1877), (cid:3031)(cid:3024)(cid:3031)(cid:3047)(cid:3404)(cid:3010)(cid:3118)(cid:3019)(cid:3049) (cid:4672)(cid:3398)(cid:3031)(cid:3052)(cid:3031)(cid:3047)(cid:4673)(cid:3404)(cid:3010)(cid:3118)(cid:3019)(cid:3049) (cid:1874)(cid:3404)(cid:1835)(cid:2870)(cid:1844)

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Physics: Principles with Applications
7th Edition, 2013
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ISBN: 9780321625922

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Related Questions

The figure shows a bar of mass m that can slide without friction on a pair of rails separated by a distance l and located on an inclined plane that makes an angle θ with respect to the ground. The resistance of the resistor is R, and a uniform magnetic field of magnitude B is directed downward, perpendicular to the ground, over the entire region through which the bar moves. With what constant speed v does the bar slide along the rails?

The bar in Figure OQ31.6 moves on rails to the right with a velocity , and a uniform, constant magnetic field is directed out of the page. Which of the following statements are correct? More than one statement may be correct.

(a) The induced current in the loop is zero.

(b) The induced current in the loop is clockwise.

(c) The induced current in the loop is counterclockwise.

(d) An external force is required to keep the bar moving at a constant speed.

(e) No force is required to keep the bar moving at a constant speed.

The figure below shows a bar of mass m = 0.280 kg that can slidewithout friction on a pair of rails separated by a distance = 1.20m and located on an inclined plane that makes an angle ? = 33.0°with respect to the ground. The resistance of the resistor is R =1.80 O and a uniform magnetic field of magnitude B = 0.500 T isdirected downward, perpendicular to the ground, over the entireregion through which the bar moves. With what constant speed v doesthe bar slide along the rails?