5:Region 1 (20) is a dielectric with Er1 = 2 and, Region 2 (y<0) has Ep2 = 4 is also dielectric, =-20a, +40ay + 80a,, find Dn2, D12,01, 02

If there is an energy gap of 5eV between conduction band and the valence band in a material, such materials behave as semiconductors conductors insulators non-conductors

Caculate the time for 21(Tau) in (milliseconds) for the following RC Circuit. Assume switch is closed and capacitor is in a charge state. t=0 LE -10 V R1 1kQ C1 1uF

#4 A capacitor has 0.035 * 0.035 m parallel plates. The distance between the plates is 0.092 m in free air. A dielectric material whose permittivity is 6 and 0.0003 m thick is placed in the upper plate, leaving an air gap between the bottom plate and the dielectric, what is the capacitance of the capacitor? C =