A coaxial capacitor of length 1 = 6 cm uses an insulating dielectric material with = 9. The radii of the cylindrical inner and outer conductors are 0.5 and 1 cm, respectively. If the applied voltage caross the capacitor is V(t) = 50sin (120πt), find the displacement current. Ignore the fringing effects.

The parallel plate capacitor in the figure below has a plate area A and plate separation d. The capacitor is charged to a voltage Vo, and then isolated. A student then inserts a dielectric slab (dielectric constant K) with thickness t and area A between the plates and parallel to them as shown below (the dielectric does not touch the plates at any time). Once the slab is in place, the student measures the potential difference between the plates. What potential difference will the student measure? You can assume the following numerical values: A=115.0 cm2, d=1.240 cm, Vo=65.00 V, t=0.7800 cm and K=2.610. O24.90 V 39.78 V 65.00 V None of these The answer will depend on the distance of the dielectric from the positive plate, which is not provided in the problem V

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