What is the drift velocity of electrons in a copper wire of…

What is the drift velocity of electrons in a copper wire of diameter 1.628 mm carrying 20.0 A of current?   The density of free electrons is calculated to be 8.34 x 1028 electrons/m3.  The charge of an electron is -e (-1.60 x 10-19C).   If a copper wire of diameter of 2.304 mm is used, what is the drift velocity?  Why are the drift velocities you calculated MUCH less than the signal speed in the order of 108 m/s? (3 points).

5 wires meet at a junction.  I1 (current 1) and I2 (current…

5 wires meet at a junction.  I1 (current 1) and I2 (current 2) are going into the junction.   I3 (current 3), I4 (current 4) and I5 (current 5) are coming out of the junction.  a) Using Kirchhoff’s first rule, write the current equation. (1 point)b) If I1 = 1.46 A, I2 = 3.25 A, I3 = 1.71 A, I4 = 2.1 A, what is the value of I5? (2 points).