1.

Two parallelvertivcalinetallicralisAB and CDare serparated by l= 1 m . Theyare connected at theendsby resistance R_(1) and R_(2) as show in the figure . A horizationlmetallic bar L of massm= 0.2 kg slides withoutfrictionvertically down the railsunderthe actionof gravity. Theseis a unifromhorizonal magneticfield of aB=0.6 Tperpendicular to the plane torails. Itis observedthat when the termainalveloctity is attained , the powerdisspated in R_(1) and R_(2)are P_(1)= 0.76W andP_(2) = 1.2 W respectively. Findthe terminal velocityof barL andthe values of R_(1) and R_(2)

Answer»


Answer :`R_(1)=(P_(1)+P_(R))^(2)/(P_(1))(B^(2)L^(2))/(m^(2)g^(2))=0.47 OMEGA; R_(2) =(P_(1)+P_(2))^(2)/(P_(2)).(B^(2)l^(2))/(m^(2)g^(2))= 0.2 Omega;
V=(mg)/(B^(2)l^(2)).(R_(1)R_(2))/(R_(1)+R_(2))=0.997 m//s`


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