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How does voltage drop work in an electrical circuit?
Voltage drop in an electrical circuit occurs when there is resistance in the circuit, causing a decrease in voltage as the current flows through the components. This drop in voltage is proportional to the amount of resistance in the circuit, following Ohm's Law (V I R).
What is the voltage obtained when a capacitor is placed in a dc circuit?
Eventually, the capacitor will charge to approximately the source voltage level. As this occurs, the current in the circuit will drop to near zero.
What is leakage voltage?
There is no such thing.What there is is leakage current, which is the amount of undesired current flow in a branch of an actual circuit when that branch of the equivalent ideal circuit would have no current flow.Leakage current can also be used to refer to current that occurs on a path where there is no intentional circuit branch (e.g. corona discharge current to the air in a high voltage system).
What is AC voltage terminology - in phase - mean?
If the current rises and falls with the voltage, then the two are said to be 'in phase'; this occurs in a purely-resistive circuit. For inductive or capacitive circuits, the current either lags or leads the voltage.
What is matual induction?
Mutual (not 'matual') induction occurs when a changing current in one circuit induces a voltage into a second circuit. An example of mutual induction is a transformer.
What is restriking voltage?
Restriking voltage is the voltage that appears across the contacts of a circuit breaker after the current-carrying contacts separate during an interruption. It occurs due to the re-ignition of the arc between the contacts, creating a momentary rise in voltage in the circuit. This can potentially damage the circuit breaker and equipment if not properly managed.
What effect does an increase in current have on voltage?
That depends on the circuit - but note that in almost all real circuits the current is the dependent variable - you control the voltage and the current sets itself.
What do you mean lagging in electrical?
Lagging means the current is out of phase, lagging behind, the voltage. This occurs when there is inductive reactance in the circuit, such as with motors and transformers.
How does a multimeter read volts?
A multimeter reads volts by measuring the electrical potential difference between two points in a circuit. It does this by sending a small known current through the circuit and measuring the voltage drop that occurs. The multimeter then displays this voltage drop as the voltage value on its screen.
What happens to the applied voltage when a change in circuit resistance occurs?
When a dc supply is connected to a resistor, current flows. The current in amps is equal to the supply voltage divided by the resistance in ohms. The power used is the voltage times the current, and that appears as heat in the resistor, which might become hot to touch.
What is the effect on the current when a short circuit occurs?
The current increases.
What is an opposition to current flow called that occurs in an alternating current circuit?
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).
