magnitude 3 N direction 4---Select---to the rightto the leftinto the pageout of

Question

magnitude 3 N direction 4---Select---to the rightto the leftinto the pageout of the page The conducting rod ab shown in the figure below makescontact with metal rails ca and db. The apparatusis in a uniform magnetic field of 0.800 T, perpendicular to theplane of the figure. (a) Find the magnitude of the emf induced inthe rod when it is moving toward the right with a speed8.90 m/s. (b) In what direction does the current flow in the rod? Nocurrent flows in the rod. froma to b from b to a (c) If the resistance of the circuit abdc is 3.40 ? (assumed to be constant), find theforce (magnitude and direction) required to keep the rod moving tothe right with a constant speed of 8.90 m/s. You can ignorefriction.

Explanation / Answer

(a) Find the magnitude of the emf induced inthe rod when it is moving toward the right with a speed8.90 m/s.
emf = B v L = 3.56 V

(b) In what direction does the current flow in the rod?
2 from b toa
(c) If the resistance of the circuit abdc is 3.40 (assumed to be constant), find theforce (magnitude and direction) required to keep the rod moving tothe right with a constant speed of 8.90 m/s. You can ignorefriction. magnitude: 0.42N
Direction: to the right



2 from b toa 2 from b toa 2 magnitude: 0.42N
Direction: to the right

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