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4. When a 420 nF capacitor is connected to a voltage supply, the energy stored in the capacitor is 1.7-1Rs . while the capacitor is kept connected to the power supply, a slab of dielectric is inserted that comptetely fill the space between the plates. This increases the stored energy by 2.8-101. a. What is the dielectric constant of the slab? b. How much extra charge is supplied by the power supply during this process? 5. Is it possible to decrease the capacitance of a parallel-plate capacitor by adding a material in between the plates? Why or why not? 6. Explain why the dielectric constant does not depend on the thickness of the material.
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17XoSx2 920 x1o7 720 - 420 2. 仔 -Geledere Const.ng k n insehed into it 2D ihind clokp e ai 느 420x10.9 χ 8.99735 = 3778, 887314 二2444.989 89 χ109 C こ2444.93989わc Aish .

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