Example: Metal Cart: Difference between revisions
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==Problem== |
==Problem== |
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A DC generator is built using a metal cart with metallic wheels that travel around a set of perfectly conducting rails in a large circle. The rails are L m apart and there is a uniform magnetic <math>\vec B</math> field normal to the plane as shown in Figure 1. The cart has a mass m and is driven by a rocket engine having a constant thrust F. A wet polar bear lays dead across the tracks acting as if a resistor R is connected as a load. Find The current as a function of time. What is the current after the generator attains the steady-state condition? |
A DC generator is built using a metal cart with metallic wheels that travel around a set of perfectly conducting rails in a large circle. The rails are L m apart and there is a uniform magnetic <math>\vec B</math> field normal to the plane as shown in Figure 1. The cart has a mass m and is driven by a rocket engine having a constant thrust F. A wet polar bear lays dead across the tracks acting as if a resistor R is connected as a load. Find The current as a function of time. What is the current after the generator attains the steady-state condition? |
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Figure 1 will be shown here |
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[[Image:Emec_cart_polarBear.png]] |
[[Image:Emec_cart_polarBear.png]] |
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[[Image:Emec_cart_polarBear.png|200px|thumb|left|alt text]] to use a 200 pixel wide rendition in a box in the left margin with 'alt text' as description |
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Revision as of 17:30, 25 January 2010
Problem
A DC generator is built using a metal cart with metallic wheels that travel around a set of perfectly conducting rails in a large circle. The rails are L m apart and there is a uniform magnetic field normal to the plane as shown in Figure 1. The cart has a mass m and is driven by a rocket engine having a constant thrust F. A wet polar bear lays dead across the tracks acting as if a resistor R is connected as a load. Find The current as a function of time. What is the current after the generator attains the steady-state condition?
