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To reduce 24 volts DC to 12 volts DC using a resistor, you can use Ohm's Law (V = IR). The required resistance depends on the load current you are working with. For example, if the load draws 1 ampere, you would need a resistor with a value of 12 ohms (R = V/I = 12V/1A). However, using a resistor for voltage regulation is not efficient and can cause power loss; a DC-DC converter is a better solution for reducing voltage in most applications.
What else can I help you with?
What is 50 millivolts equal to in milli amps?
Milli volt is one thousandth of a Volt and Milli amp is one thousandth of an Amp. Volt and Amp measure two different things and are not really comparable. Over simplified, here is how it works. Volt measures the 'pressure' that causes current to flow. Current flow is measured in Amps and depends on the how much resistance the 'pressure' has to overcome. Higher the resistance, lesser the current (Amp) for same pressure (Volt)
Placing a voltmeter into a circuit will raise the circuit resistance?
Usually a volt meter is placed across a component to measure the voltage drop across that component. Doing this places the volt meter resistance in parallel with that component's resistance, which will always lower the total resistance. Since the volt meter resistance is usually very large relative to the resistance of the element being measured, the total resistance does not change significantly. The formula for total resistance of two parallel elements is: Rtot = (R1*R2)/(R1+R2), as R1 (the volt meter) >> R2, Rtot ~= (R1*R2) / (R1) = R2 If a volt meter is placed into a circuit instead of around an element of that circuit, it will raise the resistance of the circuit, load the circuit with, and interrupt "normal" operation of the circuit (normal operation = how things would be without the meter in place). More importantly, the volt meter would then be measuring the voltage developped across itself (instead of an element of the circuit), which is not the point of this tool / this would be a misapplication of a volt meter.
When connected to a 110-volt power supply how much current does a light bulb draw when it has a resistance of 220-ohms?
The formulas you are looking for is I = E/R.
What is the resistance value if you connect the 3 volts led at 220 volts?
To calculate the resistance needed, you can use Ohm's Law: R = V^2 / P, where R is resistance, V is voltage, and P is power. In this case, R = (3^2) / 3 = 3 ohms. You would need a 3-ohm resistor to safely connect a 3-volt LED to a 220-volt source.
How long does current remain in a 220 volt circuit?
The current in a 220 volt circuit depends on the resistance of the load connected to it. Ohm's Law (I = V/R) states that current (I) is equal to voltage (V) divided by resistance (R). So, the current will vary based on the resistance of the circuit.
What gives the biggest resistance 3 volt bulb or 6 volt bulb?
3 volt bulb gives the biggest resistance
What is the total resistance of a parallel circuit with branch voltages of 440 volt and 440 volt and branch currents of 4 amp and 16 amp?
resistance = volt / current . 440 volt across a parallel circuit means the same 440 volt across both resistance s. hence resistance r = volt / current . 440 / 20 amp = 27.5 ohms total resistance
Actual internal resistance of 1.5 volt battery?
The value of internal resistance of 1.5 volt battery is 0.5 ohms.
What is the average current output of a new 1.5 volt drycell AA battery?
The current output is governed by the load resistance of the circuit. The battery will try and supply as much current as needed up until the battery goes dead.
How much available current in a 9 volt battery?
It depends on the resistance of the circuit, as V=IR, so I=V/R (V=Voltage, I=Current, R=Resistance)
How much resistance is in the circuit if it uses a current of 10ma?
Just use Ohms Law: V=IR, that is, voltage (in Volt) = current (in Ampere) x resistance (in Ohms).
A DC voltmeter has a resistance of 20000 ohms per volt What is the resistance of the meter if the range selection switch is set on the 250 volt range?
5 megohms
Is one volt enouph pressure for 1 ohm of resistance?
one volt applied across one ohm of resistance causes a current flow of one
What is 50 millivolts equal to in milli amps?
Milli volt is one thousandth of a Volt and Milli amp is one thousandth of an Amp. Volt and Amp measure two different things and are not really comparable. Over simplified, here is how it works. Volt measures the 'pressure' that causes current to flow. Current flow is measured in Amps and depends on the how much resistance the 'pressure' has to overcome. Higher the resistance, lesser the current (Amp) for same pressure (Volt)
How can you improve volt-drop?
A: Decreasing the current and/or the resistance
Placing a voltmeter into a circuit will raise the circuit resistance?
Usually a volt meter is placed across a component to measure the voltage drop across that component. Doing this places the volt meter resistance in parallel with that component's resistance, which will always lower the total resistance. Since the volt meter resistance is usually very large relative to the resistance of the element being measured, the total resistance does not change significantly. The formula for total resistance of two parallel elements is: Rtot = (R1*R2)/(R1+R2), as R1 (the volt meter) >> R2, Rtot ~= (R1*R2) / (R1) = R2 If a volt meter is placed into a circuit instead of around an element of that circuit, it will raise the resistance of the circuit, load the circuit with, and interrupt "normal" operation of the circuit (normal operation = how things would be without the meter in place). More importantly, the volt meter would then be measuring the voltage developped across itself (instead of an element of the circuit), which is not the point of this tool / this would be a misapplication of a volt meter.
How do you reduce 14 volt DC to 10 volt DC?
Use a properly rated potentiometer.
