A conductor having a cross-sectional area of 0.00161 sq in. carries. a current of 4.5 amp. Calculate the electron velocity, assuming the wire to be (a) copper, (b) aluminum.
A=0.00161inc2
I=4.5 amp
nAl=18.1×1028m−3n_{Al}=18.1\times10^{28} m^{-3}nAl=18.1×1028m−3
ncu=8.39×1028m−3n_{cu}=8.39\times10^{28} m^{-3}ncu=8.39×1028m−3
I=nAleAvdI=n_{Al}eAv_dI=nAleAvd
Vd=InAleAV_d=\frac{I}{n_{Al}eA}Vd=nAleAI
Put value
Vd=IncueAV_d=\frac{I}{n_{cu}eA}Vd=ncueAI
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