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It depends on what kind of amp it is. Is it an audio amp or an rf amp . .
A 3 kW audio amp would draw about 300 watts on average at most, so with a good reservoir capacitor the supply current would be 0.2 amps. A 3 kW rf amp for AM radio would draw about 4500 watts so the supply current would be 3 amps.
What else can I help you with?
Can a 12 volt battery charger use to power a 12 volts amplifier?
The battery charger can be used but it is not recommended. The battery charger does not have filtering on the its output like a power supply does. You will probably hear an AC ripple on the amplifier which will become very annoying when listening to the amplifier.
How A flat-screen television uses 3 amps and has a power rating of 300 watts. How many volts does it need?
To find the voltage required for the flat-screen television, you can use the formula: Power (watts) = Voltage (volts) x Current (amps). Rearranging the formula gives you Voltage = Power / Current. Therefore, with a power rating of 300 watts and a current of 3 amps, the voltage needed is 300 watts / 3 amps = 100 volts.
How many watts are in 30 volts?
To calculate the power in watts, you will also need to know the current in amperes. The formula to calculate power is P (watts) = V (volts) x I (amperes). If you only have the voltage (30 volts) and not the current, you cannot determine the power in watts.
What volt circuit is needed for an 8.5 amp electric motor that uses 550 watts in 1 hour?
To calculate the voltage needed for the electric motor, use the formula Power = Voltage x Current. Given the power (550 watts) and current (8.5 amps), rearrange the formula to solve for voltage: Voltage = Power / Current. Plugging in the values, the voltage required for the motor would be approximately 64.7 volts.
How many volts is 450 watts?
To calculate the voltage, you need to know the current (amperage) as well. The formula to calculate power (watts) given voltage (volts) and current (amps) is: Power (P) = Voltage (V) x Current (I). Without knowing the current, it is not possible to directly convert watts to volts.
Can a 12 volt battery charger use to power a 12 volts amplifier?
The battery charger can be used but it is not recommended. The battery charger does not have filtering on the its output like a power supply does. You will probably hear an AC ripple on the amplifier which will become very annoying when listening to the amplifier.
How can you calculate current when you have volts power?
Divide Watts by Volts ; this gives you Amps.
How do volts get power?
Volts cause current to flow through the load. The current is measured in amps, and the volts multiplied by the amps gives the power in watts.
Why does an amplifier need a power supply?
The power supply in either a guitar amplifier or in a professional sound amp reduces the 110v alternating current to a direct current. Also it reduces the voltage that can be used by the speakers, usually 12+ volts. Also if there where no power supply and there could be a possible way of reducing the voltage that could be used in the same was a direct current, you would here a constant phasing type noise from the current alternating. A power supply unit converts power that can be used in correctly in sound frequencies.
What is percent of power loss at 415 volts against 11000 volts?
Power = voltage times current, and the power loss is the loss in the line, I^2 * R. At 11,000 volts, the current will be (11,000 / 415 = ) 3.77% of what it is at 415 volts. So the power loss in the line at 11,000 volts will be (3.77% ^2 = ) .14% of what it is at 415 volts.
Can I conect 4 ohm loudspeakers to 8 ohm output of my tube amp as the sound is better?
No. An amplifier designed for an 8 ohm load works best with an 8 ohm load. You can connect a 4 ohm load to it, but the current rating curve of the amplifier will not match the voltage rating curve, and will will not achieve rated power. Attempting to achieve rated power will result in damage to the amplifier. Look at this mathematically... If the amplifier is rated 100 watts into 8 ohms, then it can produce 28 volts doing so. It will also produce 3.5 amperes at that power. So, when we say the amplifier is rated 100 watts into 8 ohms, we mean that the amplifier is rated 28 volts or 3.5 amperes, whichever comes first. Connect a 4 ohm load to this amplifier, and 3.5 amperes will induce 14 volts and 50 watts. You cannot get 100 watts because that would require 5 amperes and 20 volts, and the amplifier cannot produce 5 amperes.
How A flat-screen television uses 3 amps and has a power rating of 300 watts. How many volts does it need?
To find the voltage required for the flat-screen television, you can use the formula: Power (watts) = Voltage (volts) x Current (amps). Rearranging the formula gives you Voltage = Power / Current. Therefore, with a power rating of 300 watts and a current of 3 amps, the voltage needed is 300 watts / 3 amps = 100 volts.
How many watts are in 30 volts?
To calculate the power in watts, you will also need to know the current in amperes. The formula to calculate power is P (watts) = V (volts) x I (amperes). If you only have the voltage (30 volts) and not the current, you cannot determine the power in watts.
Is power the product of voltage and current?
Yes, electrical power in Watts is volts x amps
What volt circuit is needed for an 8.5 amp electric motor that uses 550 watts in 1 hour?
To calculate the voltage needed for the electric motor, use the formula Power = Voltage x Current. Given the power (550 watts) and current (8.5 amps), rearrange the formula to solve for voltage: Voltage = Power / Current. Plugging in the values, the voltage required for the motor would be approximately 64.7 volts.
5.0 amps watts?
To find the power in watts, multiply the current (5.0 amps) by the voltage (which is needed to provide the full power calculation). Without voltage information, we can't determine the power in watts solely from current (amps).
What is the Formula to measure current if power is given?
Power = Voltage x Current Watts = volts x Amps
