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Chapter 27
Electromotive force (emf) is the force that causes current to flow from a higher to a lower potential. The term "electromotive ...
A resistor is an ohmic device that limits the flow of charge in a circuit. Most circuits have more than one resistor. If several resistors are connected ...
Resistors are in parallel when one end of all the resistors are connected to a continuous wire of negligible resistance and the other end of all the ...
Electrical devices in any circuit can be connected either by series or parallel connections. Additionally, circuits can be connected involving both of ...
Gustav Kirchhoff (1824–1887) devised two rules known as Kirchhoff's rules to analyze complex circuits, which cannot be analyzed with ...
Kirchhoff's rules quantify the current flowing through a circuit and the voltage variations around the loop in a circuit. Applying Kirchhoff's ...
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts ...
Generally, a single battery is not enough to power some devices. In such cases, batteries can be combined in two ways: in series or in parallel. In ...
Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), ...
An ammeter is a current measuring instrument. In the circuit, it is represented by the symbol A. The ammeter is placed in series with the device or ...
A voltmeter is an electrical device that measures the potential difference or voltage between two points. It is connected in parallel with the circuit ...
Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, ...
An ohmmeter is a resistance-measuring device. It works by applying a voltage to a resistor of unknown resistance and measuring the current across the ...
The equivalent resistance of a combination of resistors depends on their values and how they are connected. The simplest combinations of resistors are ...
A circuit containing resistance and capacitance is called an RC circuit. A capacitor is an electrical component that stores electric charge by storing ...
One of the applications of an RC circuit is the relaxation oscillator. The relaxation oscillator comprises a voltage source, a capacitor, a resistor, and ...
A relaxation oscillator is one of the applications of RC circuits. A neon lamp relaxation oscillator comprises a capacitor, a resistor, a voltage source, ...
Companies that supply power to most modern households use three conductors, typically called a three-wire line. While one is neutral, the other two are ...
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