A parallel-plate capacitor has a capacitance of 10 mF and is charged with a 20-V power supply
The power supply is then removed and a dielectric material of dielectric constant 4.0 is used to fill the space between the plates. What is the voltage now across the capacitor?
A) 2.5 V B) 10 V C) 5.0 V D) 80 V E) 20 V
C
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