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Q.30 A Rectangular block of iron has dimensions LXLX b. What is the resistance of the blockmeasured between the two square ends ? Given p= resistivity.

Answer»

As we knowR = ρ L/Awhere ρ is resistivity of the materialHere in this case, length is given as Land area is given as L×bSo,Resistance,R = ρ L/Lb = ρ/b



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