A thin, 50 0 cm Iong metal bar with mass 750 g rests n, but is not attached to, two metallic supports in a uniform 0 450 Tmagnetic field, as shown v R in Fig A battery and a 25 0 Omega resistor in series are connected to the supports (a) What is the highest voltage the battery can have without brea...

Physics
Electricity and Magnetism
A thin, 50.0-cm-Iong metal bar with mass 750 g rests

A thin, 50.0-cm-Iong metal bar with mass 750 g rests n, but is not attached to, two

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A thin, 50.0-cm-Iong metal bar with mass 750 g rests n, but is not attached to, two metallic supports in a uniform 0.450-Tmagnetic field, as shown v R in Fig. A battery and a 25.0-Ω resistor in series are connected to the supports.
(a) What is the highest voltage the battery can have without breaking the circuit at the supports?
(b) The battery voltage has the maximum value calculated in part (a). If the resistor suddenly gets partially short-circuited, decreasing its resistance to 2.0 Ω, find the initial acceleration of the bar.

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R B > x x x X Axx x

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IDENTIFY and SET UP The magnetic force is given by Eq2719 Fmg when the bar is just ready to levit...View the full answer

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Question Posted: Apr 04, 2010 11:56 PM

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