resistance
Parallel circuit
Direct Current
A break in an electric circuit is called an open circuit. Electric current will not flow through an open circuit.
An operating circuit, is by definition, complete. The electrons in a DC circuit flow from the -ve terminal of the power source, through the various components and switches etc, then to the +ve terminal of the power source.
A circuit must be closed in order for a current to flow because it helps keep a current flow pass. When the switch is closed on a circuit there is a constant flow. When the switches open the flow is disturbed around the circuit.
In a DC circuit . . . resistance. In an AC circuit . . . impedance.
The term Impedance (Z) is used to quantify the opposition to current flow in a circuit.
Impedance.
Answer: Inductive reactance is the opposition to the change in current in an electrical circuit and is abbreviated Xl. Answer: The opposition to current flow is called resistance (for DC), or impedance (for AC; often just called resistance); the unit for both is the ohm.
I oppose alternating current. Direct is the only way for me. That is 1 in opposition.
Back EMF.
Total resistance.
In the simplest case, that would be resistance - but there is also another type of opposition (only relevant for AC) called reactance. The combined effect of resistance and reactance is called impedance.
Assuming you are talking about an AC circuit, then the total opposition to the flow of current in an R-C circuit is called its impedance (symbol: Z), measured in ohms. This is the vector sum of the circuit's resistance (R) and its capacitive reactance (XC) -each also measured in ohms.
A measurement of opposition to electric current flow in a component or circuit.
Resistance
The resistance is called impedance, and is equal to the measured voltage divided by the measured current, through Ohm's Law (V = ZI, Z = V/I).