Chapter Review Test A source of charges at a point is at the middle of two large metal plates 2 cm apart. One of the plates is maintained at 1200 V above the other plate. Find the potential wodient at the source measured at right angles to the plates.

Question 14 Listen A point charge Q creates an electric potential of +150 V at a distance of 15 cm. What is Q? Express your answer to two significant figures and include the appropriate units. 2.50x10^-9C 2.0x10^-9C 5.0x10^-9C

Separation Plate Area (mm) Plate Charge Stored Energy (pC) Capacitance (mm²) (pF) (pJ) 6 mm 200 mm2 6 mm 400 mm² 3 mm 200 mm2 1. When the plate area was doubled and plate separation held constant, what happens to the Capacitance? 2. When the plate separation was halved and plate area held constant, what happens to the Capacitance?

Resource A paper-filled capacitor is charged to a potential difference of V, = 2.3 V. The dielectric constant of paper is x = 3.7. The capacitor is then disconnected from the charging circuit and the paper filling is withdrawn, allowing air to fill the gap between the plates. Find the new potential difference Vị of the capacitor. V = V While the capacitor is disconnected from the charging circuit, an unknown substance is inserted between the plates. The plates then attain a potential difference that is 0.69 times the original potential difference Vo (when paper filled the capacitor). What is this unknown substance's dielectric constant x„? Ky =