HW 6-1
The cross section of a portion of wire increases uniformly as shown in the figure so
it has the shape of a truncated cone. The diameter at one end is 𝑎 and at the other
it is 𝑏, and the total length along the axis is ℓ. If the material has resistivity 𝜌,
determine the resistance 𝑅 between the two ends .
HW 6-2
Use Kirchhoff’s rules to find the currents flowing in the circuit.
R
R
𝜀
HW 6-3
Determine the time constant for charging the capacitor in the circuit. What is the
maximum charge on the capacitor? Assume 𝑅1 = 𝑅2 = 𝑅.