Question

The dielectric constant of helium, measured at 0oC and 1 atmospheric pressure, is 1.000684. Under these conditions, the gas contains 2.7x1025 atoms/m3. Calculate the radius of electron cloud.

Answer 1

Answer:

1.Find the capacitance of a layer of Al2O3that is 0.5 m thick and 2000 mm2 of square area ( r = 8.854 × 10–12 Fm–1)

Solution:

Given data:

2.A layer of porcelain is 80 mm long, 20 mm wide and 0.7 µm thick. Calculate its capacitance with r = 6

Solution:

Given data:

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