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the amount of stuff in it makes it do stuff like voltage.
ANSWER: In the sky particles motion creates a potential magnetics and motion will do the same thing.
Separation of electric charges (eg by a moving magnetic field as in a dynamo). The more you separate them the higher the voltage. There are chemical ways of doing it, as in a battery.
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∙ 12y ago
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A device that creates a potential difference in an electric circuit is?
It is called power supply or battery.
When current flows in a conductor a magnetic field is created. The created magnetic field cuts the conductor which creates a voltage in the conductor. What is this voltage called?
It's called back EMF or reverse EMF. The EMF is electro-motive force, or voltage. What is happening is that the original current flow creates a magnetic field. That field then induces a voltage that opposes the original voltage that is causing the current flow. This back EMF "resists" the original voltage's efforts to cause current flow. If the created magnetic field did not oppose the original "efforts" of the voltage source to make current flow, then it would aid that voltage to make current flow. We would then get something for nothing and perpetual motion would be possible. We can't do that.
What is the difference between voltage forward voltage and voltage drop?
Voltage is the potential difference between the source & any point in the circuit. The forward voltage is the voltage drop across the diode if the voltage at the anode is more positive than the voltage at the cathode (if you connect + to the anode). Voltage drop means, amount of voltage by which voltage across load resistor is less then the source voltage.
What is voltage gain?
Voltage gain is the ratio of the output voltage of an amplifier to its input voltage.
What is voltage amplitude?
Voltage amplitude is the maximum value of a voltage.
Will a photocell work using dc voltage?
it creates a dc current
A device that creates a potential difference in an electric circuit is?
It is called power supply or battery.
How does an ammeter work?
An ammeter is a low voltage voltmeter in parallel with a small resistance resistor. Current flow through the resistor creates a voltage drop across it which is then measured by the voltmeter.
When current flows in a conductor a magnetic field is created. The created magnetic field cuts the conductor which creates a voltage in the conductor. What is this voltage called?
It's called back EMF or reverse EMF. The EMF is electro-motive force, or voltage. What is happening is that the original current flow creates a magnetic field. That field then induces a voltage that opposes the original voltage that is causing the current flow. This back EMF "resists" the original voltage's efforts to cause current flow. If the created magnetic field did not oppose the original "efforts" of the voltage source to make current flow, then it would aid that voltage to make current flow. We would then get something for nothing and perpetual motion would be possible. We can't do that.
What is alternator?
It is a device that converts mechanical energy to electrical energy on a car. It works by:the alternator creates an electric field by spinning a magnetic rotor with direct current inside stator windings. an ac voltage is developed and rectified dc. this voltage is compared to the battery voltage and determines the current through the rotor. if the battery voltage is lower than the alternator voltage, more current through the rotor increases the magnetic field and creates a larger alternator voltage. if the battery voltage is higher, less current through the rotor decreases the alternator voltage.
How does flame rectification works in a gas furnace?
AC voltage(at least 90vac) pass through the flame sensor and the ionization of the flame creates or rectifies the voltage to DC and a small microamp that can be measured with a meterl.
What are the disadvantages of half wave recrifier?
A half wave rectifier does not make a stable voltage. A single phase half wave creates a "bumpy road" where voltage modulates between sine wave maximum and zero. A three phase half wave will create a more stable, but ultimately "unclean", voltage.
What is the process taking place in a battery?
The electrical pressure is created inside a battery and it provide the voltage which creates orr pushes current to flow in the circuit.
Why can't a bulb turn on without electricity?
An incadescent bulb lights up because the voltage source creates a current through the filament of the bulb and it heats up because of its composition and gives off light as a result. No electricity, no voltage and no current.
What technology does a microphone use?
A microphone is a device that converts mechanical pressure waves or sound in air into electrical voltage waves. Speaking into a microphone excites (moves) a diaphragm that is coupled to a device that creates an electrical voltage proportional to the produced sound pressure.
What can electric current produce?
Voltage. Or, if you prefer, electromotive force (emf). What creates voltage? Electromagnetic action. Electrochemical action. Piezoelectric effect. Photoelectric effect. Thermoelectric effect. Contact electrification (static electricity). What was left out? BREAKDOWN produce in a crystal
Can electric fields be harmful?
Before lightening strikes, there has to be an electric field. If you grab a live wire, the voltage of the wire creates an electric field in you which drives the current that kills you.
