Right Answer: Circular polarization is a type of electromagnetic wave polarization where the electric field rotates in a circular motion as the wave propagates. It can be either right-handed or left-handed, depending on the direction of the rotation.
Right Answer: An RC circuit consists of a resistor (R) and a capacitor (C) connected in series.
**Charging:** When a voltage source is connected, the capacitor charges through the resistor. The voltage across the capacitor (Vc) increases exponentially and can be described by the equation Vc(t) = V(1 - e^(-t/RC)), where V is the source voltage, t is time, R is resistance, and C is capacitance. The time constant τ = RC determines how quickly the capacitor charges; after about 5τ, the capacitor is considered fully charged.
**Discharging:** When the voltage source is removed, the capacitor discharges through the resistor. The voltage across the capacitor decreases exponentially, described by Vc(t) = V0 * e^(-t/RC), where V0 is the initial voltage across the capacitor. Again, the time constant τ = RC dictates the discharge rate; after about 5τ, the capacitor is nearly fully discharged.
