Please show all your work and explain it i really dont knwo this at all A cylind

Question

Please show all your work and explain it i really dont knwo this at all

A cylindrical conductor (shown in the figure) having three different sections (1,2,3) made of two different materials (rho i= 5.25 Times 10^-8 Ohm m = rho 3 = 2 rho_2) and different lengths (l_1 =1.0 cm = l_3 = l_2/2 ), and radii (r_3 = 1.5 mm = 3r_3 = r_2/2) is connected to 0.20 V voltage source across the two ends (A-B). Calculate and then plot the values of: the electric field, the voltage, the resistivity, the drift velocity and mean scattering time mean scattering time as a function of the position in that conductor (from A to B), dearly indicating the three sections. Stack the five plots vertically above each other with the same horizontal axis.

Explanation / Answer

resistivity is of total system is

RESISTANCE R=R1+R2+R3

SO 1/RHO=1/RHO1+1/RHO2+1/RHO3

R=RHOL/A

DRIFT VELOCITY = ELECTRON MOBILITY * ELECTRIC FIELD

ELECTRIC FIELD = VOLTAGE /TOTAL DISTANCE

E=0.2/L1+L2+L3

L1+L2+L3=1+L2+L2/2=1+3L2/2

AREA = PI*r^2

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