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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Current Electricity
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Q)

Calculate the mean free path in Cu at room temperature 300K, if the number density of free electrons is 8.5×1028/m3 and resistivity r=1.7×108mhom. Given k=1.38×1023J/Kand1A=1010m

(A)25A(B)20A(C)5A(D)30A

 

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