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A 100-w light bulb is turned on it has an operating voltage of 120 V how much current flows through the bulb?
Wiki User
∙ 13y ago
The formula you are looking for is I = W/E. Amps = Watts/Volts.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoP=UI
P is your power in watts
U is your potential in volts
I is your current in amps
So it would be 100W/120V=0.83A or 830mA
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Does voltage flow through a circuit or is it established across a circuit?
The 'charges' (electrons, in the case of a metal conductor) are ALREADY distributed within the conductor. They are in a state of constant, haphazard, movement at just short of the speed of light. When a potential difference is applied across the conductor, there is a tendency for these electrons to move from the negative potential towards the positive potential. This tendency is VERY slow; for example, an individual electron is unlikely to pass through the filament of a flashlight during the lifetime of its battery!
Why does the induced emf known as back emf?
In a dc motor the voltage generated in the armature acts against the supply voltage. The current is the voltage difference divided by the armature resistance. If the rotor is turned faster so that the back emf exceeds the supply voltage, the current goes the other way and the motor has become a generator.
When do you use Parallel circuit?
A parallel circuit is used when the current through several components needs to be independent of each other. The simplest example is that of lights in a home. The lights with their switches are wired in parallel. Turning on one light does not affect any others and similarly, turning a light off does not turn off any others. Each light is supplied with the same voltage which does not change even if other lights are turned on or off. A series circuit is one where the current flows through one component and then through a second component and so on. If the current flow through one component is changed, it is also changed in all the others in the series circuit. A string of Christmas lights is a good example. Removing one bulb from the string of lights will stop all the others operating because there is no current flowing through any of them.
Why relay coils produce high voltage spikes when they are switched off?
When relay is turned the magnetic field that surrounds the coil collapses. When the current goes down rapidly the voltage goes up rapidly. A diode is placed across the coil, to dissipate this spike in voltage, in order to prevent damage to semiconductor components.
What is the difference between current and voltage commutation?
Voltage commutation: This is possible in ac circuits...The thyristor gets turned off by reverse bias (negative half cycle) voltage applied across it. This is also called line commutation. Current Commutation: This is possible in dc circuits ...This type of commutation makes use of auxiliary circuit which contains inductor,capacitor,diode and even a thyristor(auxiliary). This is called Forced commutation.
What are electromagents?
Magnets that are turned on by passing an electric current through them, and turned off by not allowing an electric current through them.
When a light switch is turned on what travels through the wire?
Current flows through a wire when a light switch is turned on.
When a switch in an electrical circuit is turned off what will happen?
Closing a switch in an electrical circuit will complete the circuit. The supply voltage will then be applied to that circuit, and current will flow through that circuit.
What is Difference Between Current Source and Voltage Source?
A current source varies the output voltage to maintain the desired current. A voltage source has a constant output regardless of the current draw (up to the capacity of the supply, of course).
Are office supplies considered current assets?
most of the time they are. a current asset is an asset that is expected to be expensed or turned in cash within one year or the current operating cycle, whichever is longer
A 100-W light bulb is turned on it has an operating voltage of 120 V how much energy is used each second?
A lamp will only operate at its rated power when subject to its rated voltage. So, provided your lamp is operating at its rated voltage (120 V), it's power will be 100 W, which means its consuming energy at the rate of 100 J/s.At any other voltage, its operating power will change, and the rate at which it consumes energy will change too.
Does voltage flow through a circuit or is it established across a circuit?
The 'charges' (electrons, in the case of a metal conductor) are ALREADY distributed within the conductor. They are in a state of constant, haphazard, movement at just short of the speed of light. When a potential difference is applied across the conductor, there is a tendency for these electrons to move from the negative potential towards the positive potential. This tendency is VERY slow; for example, an individual electron is unlikely to pass through the filament of a flashlight during the lifetime of its battery!
What is ZVS quasisquare-wave converter?
ZVS techniques are techniques that force the voltage across a switch to be zero just before it is turned on or off and to keep this voltage zero while a switching transition occurs. All MOSFETs and most IGBTs have anti-parallel diodes that are built into the body of each device that allows current to flow from source to drain in a MOSFET and from emitter to collector in an IGBT. A ZVS turn-on in MOSFETs and IGBTs is therefore done by forcing current through the body-diode of the devices just before they are turned on. This clamps the voltage across the device to a single diode drop (which is a negligible voltage) during a switching transition so that turn-on switching losses are greatly reduced. A ZVS turn-off is achieved by slowing down the rate of voltage rise across a switch when it is turned off by adding some capacitance across the switch; this limits the overlap between voltage and current during the switching transition
Why does the induced emf known as back emf?
In a dc motor the voltage generated in the armature acts against the supply voltage. The current is the voltage difference divided by the armature resistance. If the rotor is turned faster so that the back emf exceeds the supply voltage, the current goes the other way and the motor has become a generator.
Why does the TV or Computer cause the lights to flicker the moment they are turned on?
The initial draw of electricity causes a fluctuation in voltage until all the internal capacitors are charged. After that the unit won't draw as much voltage and current.
How is the wind energy source collected and turned into usable energy?
By using wind turbine, linear wind motion is turn to circular motion turning the dynamo and transformed to direct current electrical energy. Wind generated electricity from the wind turbine usually varied in current and voltage, the unsteady electricity is then pass through to regulator to a steady voltage and either transformed from a direct current (DC) to alternative current (AC) for use with home appliance or stock up into battery for later use.
How many volts come out of a average outlet?
Voltage does not come out of an average home outlet under normal circumstances.In North America the common potential voltage is 120 volts and is always at the receptacle as long as the circuit is energized. When an electrical device is plugged into the receptacle, through the device's connected cord, this brings the potential supply voltage to the electrical device.When the device is turned on a current (amperage) will flow, governed by the resistance of the device. If it is a lamp, it will become bright. If it is a radio you will hear sounds.When you unplug the electrical device from the receptacle, the device will stop operating but the voltage potential will still remain on the "hot" side of the receptacle's blade contact point.
