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Unformatted text preview: force? (a) A (b) B (c) C (d) D (e) E • Question #5: Two wires of circular crosssectional areas have resistances R 1 and R 2 . If ρ 1 = 2ρ 2 , l 1 = 2l 2 and r 1 = 2r 2 , what is the ratio R 1 /R 2 ? ρ 1 , ρ 2 are the resistivities of the two wires, l 1 , l 2 are the lengths of the two wires, r 1 , r 2 are the radii of the two wires. (a) 1 (b) 1/2 (c) 2 (d) 1/4 (e) 4 www.freetestonline.com • Question #6: Two metalic bars slide along metalic rails at speeds v 1 = .1m/s and v 2 = .2m/s as shown above. The bar and the rails are situated in a magnetic field of 4T. What is the induced voltage in the bar and rails? (a) 20mV (b) 30mV (c) 40mV (d) 120mV (e) 150mV www.freetestonline.com Solutions: Question #1: a Question #2: b Question #3: c Question #4: a Question #5: a Question #6: d...
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This note was uploaded on 07/27/2010 for the course MATH MATH 1025 taught by Professor Tanny during the Spring '09 term at York University.
 Spring '09
 TANNY
 Calculus

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