Answer:
(a). The capacitance is

(b). The potential difference is necessary to produce these charges on the cylinders are 2.41 V.
Step-by-step explanation:
Given that,
Charge = 15.5 pC
Inner Radius = 0.600 mm
Outer radius = 5.20 mm
Length = 25.0 cm
(a). We need to calculate the capacitance
Using formula of capacitor

Put the value into the formula


The capacitance is

(b). We need to calculate the potential difference is necessary to produce these charges on the cylinders
Using formula of charge


Put the value into the formula


Hence, (a). The capacitance is

(b). The potential difference is necessary to produce these charges on the cylinders are 2.41 V.