The voltage $(\mathrm{V})-\operatorname{current}(\mathrm{I})$ behavior for a new material was measured. The material was fashioned into a wire $1 \mathrm{~mm}$ in diameter and $1 \mathrm{~m}$ long. The charge carriers in the material may be assumed to have a valence of 1 .

a. What is the conductivity of the material?

b. What is the conductivity of the material at $V=10$ volts?

c. What is the diffusivity of the charge carriers at $V=10$ volts and $T=298 \mathrm{~K}$ ?

d. What is their mobility?

I (amps)	V (volts)
0	0
0.001	2
0.003	5
0.005	10
0.012	20
0.050	50
0.200	100