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In an aluminium (Al) bar of square cross section, a square hole is drilled and is filled with iron (Fe) as shown in the
In an aluminium (Al) bar of square cross section, a square hole is drilled and is filled with iron (Fe) as shown in the figure. The electrical resistivities of Al and Fe are 2.7 108 2 m and 1.0 107 ' m, respectively. The electrical resistance between the two faces P and Q of the composite bar is (A) (C) 2475 64 1875 49 -452 Al Fe 2mm P 7 mm (B) (D) 50 mm 1875 64 2475 132 -HQ
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Vector Mechanics for Engineers Statics and Dynamics
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell
8th Edition
73212229, 978-0073212227
