A Bimetallic strip is made of aluminium and steel `(alpha_(Al)gtalpha_("steel"))` on heating, the strip will
A Bimetallic strip is made of aluminium and steel `(alpha_(Al)gtalpha_("steel"))` on heating, the strip will
A. Remain straight
B. Get twisted
C. Bend with aluminium on concave side
D. Bend with steel on concave side
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Correct Answer - B
Taking torque about the fixed point
`tau_(FB)=tau_(g)`
`[(6-x)Axx1g]((6-x)/(2))costheta=[6Axx(25)/(36)xxg]3costheta`
`implies ((6-x)^(2))/(2)=(6xx25xx3)/(36)implies (6-x)^(2)=25implies 6 -x=5implies x=1m`
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