def test_2layer_area():
er1, t1 = 5.0, 1e-3
er2, t2 = 1.0, 3e-3
A = 3.0
pp1 = ParallelPlates((er1, er2), (t1, t2))
pp2 = ParallelPlates((er1, er2), (t1, t2), area=A)
Va = 25.0
X = np.linspace(0, t1 + t2, 11)
assert pp1.capacitance() == approx(pp2.capacitance() / A)
assert pp1.efield(X, Va) == approx(pp2.efield(X, Va))
assert pp1.potential(X, Va) == approx(pp2.potential(X, Va))
def test_capacitance_2layer():
er1, t1 = 5.0, 1e-3
er2, t2 = 1.0, 3e-3
pp = ParallelPlates((er1, er2), (t1, t2))
assert pp.capacitance() == approx(2.767e-9)
def test_capacitance():
pp = ParallelPlates(3.5, 1e-3)
assert pp.capacitance() == approx(30.989e-9)
def test_capacitance_area():
pp = ParallelPlates(3.5, 1e-3, area=10.0)
assert pp.capacitance() == approx(309.89e-9, rel=0.001)
def test_energy():
pp = ParallelPlates(3.5, 1e-3)
Va = 10.0
expected = 0.5 * pp.capacitance() * Va**2
assert pp.energy(Va) == approx(expected)
def test_charge():
pp = ParallelPlates(3.5, 1e-3)
Va = 10.0
expected = pp.capacitance() * Va
assert pp.charge(Va) == approx(expected)
