Inductors + Caps in DC

A1 8-14

1τ

63.2%

2τ

86.4%

3τ

95.2%

4τ

98.5%

5τ

99.3% (100%)

Air-core inductor

Iron-core inductor

Variable inductor

L=\frac{N^2µA}{ℓ}

Formula that relates physical characteristics of a circuit to the inductance

τ=\frac{L}{R}

Time constant calculation formula

E=-L\frac{\Delta I}{\Delta t}

Generated voltage formula using average rate of change in current over time and inductance.

E=K\times \frac{Q_{1}\times Q_{2}}{D^{2}}

The formula for Coulomb’s law of electrostatic force

C=\frac{8.85\times 10^{-12}\times K\times A}{d}

Formula to calculate the capacitance of a capacitor

\tau=C\times R

Formula for time constant from Capacitance and Resistance

C=\frac{Q}{V}

Capacitance from plate charges and voltage

Inductance

The property of an electric circuit that opposes any change in current is

Capacitance

The property of an electric circuit that opposes any change in Voltage is