Question

Phys-400 Test 2 1. A monovalent solid has an atomic density of 4.2x1028 atom/m2 and a permittivity equal to that of vacuum (80-8.85x10-12 farads/m). Calculate the plasma frequency (op-2TVP). Is this solid transparent? a. b. By how much will the intensity of a microwave (-1010 Hz) be decreased in traveling through 1mm of this material c. 2. What is the maximum carrier density for a material with permittivity and permeability and μ° respectively to be transparent (visible light frequency-1014Hz). A capacitor with no dielectric has a capacitance C. If a dielectric with electric How much more charge can this capacitor hold when the dielectric is added b. Assuming this material have a density of 0.4x10% mol/m' calculate the 3. susceptibility X-242 is added between the electrodes a. that when it is not? electronic polarizability de 4. In a strongly polar liquid like water, the low frequency dielectric constant is dominated by orientational polarization. If the relaxation time t = 2 x 109 sec, at what frequency does the imaginary part of the dielectric constant grow to become 190 of the real part?

Answer 1

-3 hn ว่า 4.2X1 28 12 H2 "1く 、.ju'.. L. 3 ←← จ.9 〉 치 0

2 klo -10 0 0 0

dSA4 9 a6 iT