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I'm using a 18.5 volts 3.5 amps charger to charge a 12 volts battery I want to reduce voltage to 15 volts and current to about or a little less than 2 amps How to reduce charging current and voltage?
You need a regulator.
Voltage drop of 15 Volts across 2.7 killo ohm resistor?
You just stated that the voltage across the resistor is 15 volts, so that's your answer ! If the resistor is connected to a 15-V battery or to the output of a 15-V power supply, then a meter across the resistor is also across the power supply, and reads 15 volts. The current through the resistor is (V/R) = (15/2700) = 5.56 mA. The power dissipated by the resistor (and delivered by the battery) is (V2/R) = (225/2700) = 0.083 watt.
What current is a car battery?
It is 12 volts. The amount of current it can provide at 0 degrees F for 30 seconds is listed on the battery as Cold Cranking Amps (CCA). It varies from battery to battery.
How does an alternator produce different amps?
It depends on the load and the voltage. In an automobile, a battery will typically have a voltage of about 12 Volts. If the engine is not running and you turn on the lights, the lights will start drawing current from the battery and the voltage will drop by a volt or so, depending on how strong a charge the battery has. An alternator will produce in the neighborhood of 15 Volts. If it is trying to push current into a system with a fully charged battery, it will only be able to push a few amps. If the voltage in the battery drops, the alternator will be able to push more amps. A completely dead battery will draw the most current (amps).
How many volts should a battery read on a 1995 corvette?
12 volts with the engine off. 13.5 to 15-5 volts with the engine idling.
Which 12 volt bulb will draw the most current when connected to a 12 volt battery?
The bulb with the lowest resistance. Current = Volts / Resistance
What is the voltage of the standard automobile battery?
Automotive Battery VoltageMost automotive batteries are 12 volts DC (Direct Current].
Three identical resistors each 45 ohms are connected in parallel across a 60-V battery The current through or drawn from the battery is?
If 3 identical 45-ohm resistors are connected in parallel, the net effective resistance of the bunch ...and the load seen by the battery ... is 15 ohms. The current supplied by the battery is60/15 = 4 Amperes.(This assumes that the battery is capable of supplying 4 amps at 60 volts, or 240 watts !)
How many volts are in 575 cranking amps?
There is no direct conversion between cranking amps and volts. Cranking amps (CA) measure the amount of current a battery can provide for a short period, while volts measure the electrical potential difference. A battery's voltage is typically around 12 volts for a standard automotive battery.
What is DC in electric stand for?
Volts direct current eg battery As opossd to Vac wich is volts altinating current eg mains supply
Is a battery a kilowatt?
A battery stores charge and supplies voltage and current. A kilowatt (KW) is a measure of power = Volts x Amps.
Can you charge an 8.4 volt battery on a 7.2 volt battery?
No. It requires more that 8.4 volts to charge a 8.4 volt battery. If the 8.4 volt battery is discharged to less than 7.2 volts then it might charge up to 7.2 volts but no higher. Once the voltages are the same then current stops flowing and charging stops.
