**Circuits**
============

An *electrical circuit* is an interconnection of electrical components consisting of
a closed loop, giving a return path for the current.

.. py:currentmodule:: symplyphysics.laws.electricity.circuits

**Contents:**

.. toctree::
    :maxdepth: 4

    laws.electricity.circuits.couplers
    laws.electricity.circuits.diodes
    laws.electricity.circuits.filters
    laws.electricity.circuits.resonators
    laws.electricity.circuits.transmission_lines
    laws.electricity.circuits.waveguides
    laws.electricity.circuits.admittance_in_parallel_connection
    laws.electricity.circuits.capacitance_in_parallel_connection
    laws.electricity.circuits.capacitance_is_proportional_to_plate_area
    laws.electricity.circuits.capacitance_of_spherical_capacitor
    laws.electricity.circuits.capacitor_impedance_from_capacitance_and_frequency
    laws.electricity.circuits.capacitor_impedance_from_capacitive_reactance
    laws.electricity.circuits.coil_impedance_from_inductive_reactance
    laws.electricity.circuits.coil_impedance_via_inductance_and_frequency
    laws.electricity.circuits.energy_stored_in_capacitor_via_capacitance_and_voltage
    laws.electricity.circuits.energy_stored_in_inductor_via_inductance_and_current
    laws.electricity.circuits.impedance_in_serial_connection
    laws.electricity.circuits.impedance_module_of_the_serial_resistor_coil_capacitor_circuit
    laws.electricity.circuits.inductance_in_serial_connection
    laws.electricity.circuits.input_impedance_of_thin_film_resistor
    laws.electricity.circuits.oscillation_period_of_inductor_capacitor_network
    laws.electricity.circuits.resistance_in_serial_connection
    laws.electricity.circuits.sum_of_currents_through_junction_is_zero
    laws.electricity.circuits.sum_of_voltages_in_loop_is_zero
    laws.electricity.circuits.time_constant_of_resistor_capacitor_circuit
    laws.electricity.circuits.varactor_junction_p_n_capacity
    laws.electricity.circuits.voltage_across_charging_capacitor_in_serial_resistor_capacitor_circuit