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The conductivity of Graphite is 7 x10^4 mho/m^2. The mobility of electrons inside Graphite is 0.2...

The conductivity of Graphite is 7 x10^4 mho/m^2. The mobility of electrons inside Graphite is 0.2 m^2/Volt Second. Consider a bar of Graphite that is 10 cm long, across which a voltage of 1 volt is applied.

1 - The velocity of electrons inside Graphite is:

Substantially lower than the velocity inside Copper (3 cm/sec)

About the same as the velocity inside Copper.

Substantially higher than the velocity inside Copper.

2 – The current density in the bar is:

700 Amps / m^2

7 x 10^5 Amps / m^2

7 Amps / m^2

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