- #1
neeraj kaira
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Is it possible to decrease the voltage without decreasing the current?
neeraj kaira said:Is it possible to decrease the voltage without decreasing the current?
phinds said:yes, by decreasing the load.
Your question out of context really doesn't make any sense.
neeraj kaira said:I know this any other formula for it
neeraj kaira said:I know this any other formula for it
neeraj kaira said:Haha again ohm's law
neeraj kaira said:Ok let me tell you...i m thinking to make a charger which output should be 5v 1.5 - 2 A
And I'm getting 18 v after stepping down the voltage so i want ti decrease the voltage to 5volts keeping current high.
Hope you will get this .
berkeman said:You use a "Buck" DC-DC converter to lower the voltage with high efficiency:
http://www.maximintegrated.com/app-notes/index.mvp/id/2031
They are available off-the-shelf, or you can build your own with a Buck DC-DC converter IC, an inductor, a diode, and a capacitor.
Regards,
berkeman
PF Mentor
The main difference between current and voltage is that current refers to the flow of electric charge, while voltage is the measure of the force that drives this electric charge. Current is measured in amperes (A), while voltage is measured in volts (V).
Yes, voltage can decrease without current. This can happen when there is a decrease in the electrical resistance in a circuit, causing a decrease in the voltage drop across the circuit. However, there must still be a source of voltage present in the circuit for this to occur.
Current and voltage are directly proportional to each other, according to Ohm's Law. This means that an increase in voltage will result in an increase in current, and a decrease in voltage will result in a decrease in current, as long as the resistance in the circuit remains constant.
No, current cannot flow without voltage. Voltage is necessary to create an electric field that allows the flow of electric charge, which is what we measure as current. Without voltage, there is no force driving the electric charge to move.
Voltage can be controlled in a circuit through the use of voltage regulators or variable resistors. These components can adjust the resistance in the circuit and therefore regulate the voltage. Additionally, the source of voltage in the circuit can be adjusted or changed to control the overall voltage.