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It absolutely is-- to an amazing degree....!
You can build a thermocouple junction with the junction shorted by a loop of copper or silver perhaps as thick as your arm and perhaps a foot in diameter. When you heat the thermocouple junction with a Bunsen burner flame, the thermocouple produces perhaps 0.5 volt.
The loop current (remember Ohm's Law E=IR, I=E/R), I= 0.5/.0001= 5,000 AMPS! With a corresponding magnetic field of over 1000 Gauss (0.1 Tesla).
Your own numbers will vary depending on construction. But the point should be clear. If the loop is placed on an iron plate before the flame is turned on, the two CANNOT be separated because of the enormous magnetic field.
This would make a mind-blowing science project to demonstrate Ohm's Law. Biot-Savart Law, Thermocouples, Magnetic Fields, Energy, etc.
Another very common circuit where a high current is delivered with a low voltage is the starter motor in every car or truck! This uses usually 12 volts. The current is typically 200 amps, which would represent 200 X 12=2400watts or 2.4kw. The lead-acid cell has the capability of delivering this sort of current over and over so long as it is recharged as necessary. So the answer to the question is-YES.
Another common low voltage, high current task is welding, and particularly spot welding. The voltage can be extremely low but the current extremely high.
CommentI URGE you not to try it, but accidentally short-circuiting the terminals of a 12-V car battery will result in an enormous current -more than enough to melt the terminals and, possibly, cause the battery to explode.
Wiki User
∙ 11y ago
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∙ 13y agoA: ABSOLUTELY and it works both ways hi to low or low to hi voltage . however there are some efficiency losses due to components losses. A 1 WATT source will never deliver a 1 watt to the load.
Wiki User
∙ 13y agoYes. You can use lower voltage to power higher voltage loads. You need a step-up transformer, an inverter, a motor-generator set, a charge pump, or some similar type of device.
Wiki User
∙ 10y agoOf course. If no load is connected, then the voltage (regardless of its value) will not cause current to flow.
Wiki User
∙ 12y agoCurrent going through a resistor, or some such load, is represented as a voltage differential across that resistor or load.
Ohm's Law: Voltage is Current times Resistance
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∙ 12y agoYes. In AC systems, Transformers are used for this purpose. Complex electronics are used in DC.
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∙ 11y agono
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What is the need of extra high voltage transmission?
You want to deliver power as efficiently as possible. For the same input power, the higher the voltage, the lower the current required. The lower the current, the lower the ohmic power loss (R * I^2) during power transmission in the electric cable.Answerallows the use of conductors of practicable sizeeconomics (less volume of copper)reduce voltage drop along linereduce energy losses along line
Why do three phase motors have dual voltage rating?
Some motors have dual voltage ratings because it is typically better to use the higher voltage if available because the current will be lower. However, the higher voltage may not be available everywhere so the unit is designed to work on the most available voltages if the higher voltage is not available. Since the motor in your question is more for a commercial use than at home, the range of available voltages may be limited at certain sites.
Is it possible to use a dimmer switch to lower the voltage to a power tool?
Though this theoretically could work on a very few power tools, it is NOT a good idea and most likely doing it will only wreck the tool (or the dimmer switch). And why would you want to lower the voltage anyway?
Why step up transformer is required to send energy at long distances How energy losses reduces by using step up voltage while sending it to long distances?
Power is basically voltage times current. The power lines have resistance and that causes a loss of some power in transmitting the power over long lines. When the power is sent at a higher voltage, the current is lower, which means that the power lost in the wires is less. A rule of thumb for power transmission is to use 1000 volt per kilometre so for a 33 km line you would use 33 kV.
Why you use ac for transmission?
AC is used for transmission because AC can be stepped up in voltage with a transformer, and then stepped back down at the destination. Since power is voltage times current, a higher voltage requires a smaller current to achieve the same power. Since the current carrying capacity of wires is based on wire size, a smaller wire size can be used to transmit the lower current.
If voltage is 127v does this use more kilowatts than if voltage were lower?
...maybe...The black and white answer is "yes". It becomes much more grey when you're question evolves into "how much more". It depends on what you're using whether this will really make a difference. A higher voltage into a light bulb will cause more current to flow, thus a higher power usage. A higher voltage into a computer will not increase power usage by much, because the internal electronics convert this into DC that is clamped to specific values (12 volts, 3.3 volts, etc.), and the parts of the computer function on this lowered voltage. There will be a larger amount of loss in the power supply. A heater will heat more at a higher power usage than at a lower power, so voltage being higher is irrelevant - it will simply run longer and cooler at lower voltage than at higher voltage.
What is the need of extra high voltage transmission?
You want to deliver power as efficiently as possible. For the same input power, the higher the voltage, the lower the current required. The lower the current, the lower the ohmic power loss (R * I^2) during power transmission in the electric cable.Answerallows the use of conductors of practicable sizeeconomics (less volume of copper)reduce voltage drop along linereduce energy losses along line
Can you use a 250v 3a fuse to replace a 125v 3a fuse for equipment voltage is 100volt?
Yes, fuses of a higher voltage can be used safely. What is not recommended is to use a lower voltage fuse on higher voltages.
What are the advantages to having a higher wattage ac adapter for a notebook?
You should not use a power adapter with a higher voltage output than the input rating on the computer. It can cause damage to the computer and the battery. You can use a lower voltage. If you do and you are using your computer, it might not charge but it will prolong the time you have before it runs out. If you do not use it, then it will charge but slower than with the correctly rated power adapter.
How is 11kv convert to 230v?
The higher voltage it transformed to a lower voltage by the use of a step down transformer.
Why we use binary system?
Computer understands the changes in voltages. To be more precise, a higher voltage and a lower voltage determines the action the computer takes for an input. And to make it more simple for programmers, a higher voltage is given the value 1 and a lower voltage is assigned the value 0.
Name a processor that requires dual voltage how are the two voltages used?
Pentium MMX and AMD K6 both use dual voltage. The lower supply voltage is used for the core and the higher voltage is used to power the I/O pins.
What gauge is use on low votage?
The lower the voltage the larger gauge wire you will need to get the same power.
Can you use a 6v1000 Ma power adaptor in place of a 6v700 Ma?
Yes. Higher amperage source is ok but not higher voltage.
What is meant by three phase?
Three phase power is a method of electric power transmission using three wires. Three phase power systems may have a neutral wire that allows the system to use a higher voltage while still allowing lower voltage single phase appliances. In high voltage distributions, it is not common to have a neutral wire, as the loads can simply be connected between phases.
Can you use a higher voltage rating capacitor with the same uf rating?
Yes, it will work fine. The downside is that it might cost more than one of the lower voltage rating, or that it might be physically larger. A capacitor voltage rating is a maximum, so any lower voltage is also acceptable.
Why you use 33kv for power transmission?
Power loss during power transmission is predominantly due to the current drawn, which heats the wires. Power dissipated is current x voltage and voltage is current x resistance, so in any wire with fixed resistance the power loss is proportional to the square of the current flowing. The higher the voltage you use to transmit the power down the distribution network the lower is the current, hence power is distributed at the highest voltage that is practical, then the voltage is dropped to the domestic level at the destination sub-station or by a transformer on the power line pole. Major distribution systems operate at over 100 kV, with regional ones at lower voltage.Additional Answer33 kV (not 'kv'!) is the primary distribution voltage, not a transmission voltage, used in the UK. Other distribution voltages are 66 kV (not very common) and 11 kV. Transmission systems operate at 400 kV and 275 kV.
