An electron beam carries a total current of -500 μA in the σx direction and has a current density Jz in the region 0 ≤ r ≤ 10-4 m and zero in the region r > 10-4 m. Electron beam velocity is given by Vz = (8 × 107 z)m/s. Calculate the volume charge density at z = 2 cm.

An electron beam carries a total current of -500 μA in the σx direct

1.	An electron beam carries a total current of -500 μA in the σx direction and has a current density Jz in the region 0 ≤ r ≤ 10-4 m and zero in the region r > 10-4 m. Electron beam velocity is given by Vz = (8 × 107 z)m/s. Calculate the volume charge density at z = 2 cm.
A.	200 m C/m3
B.	10 m C/m3
C.	-10 m C/m3
D.	-200 m C/m3
Answer» D. -200 m C/m3

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An electron beam carries a total current of -500 μA in the σx direction and has a current density Jz in the region 0 ≤ r ≤ 10-4 m and zero in the region r > 10-4 m. Electron beam velocity is given by Vz = (8 × 107 z)m/s. Calculate the volume charge density at z = 2 cm.

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