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If voltage is not used up in a circuit then why does a battery go flat?
Odubhda
All rechargable batteries have an internal resistance, which will discharge them over time even when they're not hooked up to anything. A good lead-acid battery will lose around 20% of their charge in 60-90 days depending on temperature.
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∙ 14y ago
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What size fuse for 12v battery?
The fuse you use is determined by the load on the circuit and the size wiring used in that circuit not the battery voltage.
What would happen if the resistance in a circuit remained the same and the voltage decreased?
A well designed circuit should be able to operate over a range of voltages, not just at one voltage. Especially a circuit which is intended to be powered by a battery. As the battery starts to get used up, and the voltage drops, you want the circuit to operate as planned.
Is thermocouple voltage used for battery charging?
No, as the voltage of a single thermocouple is very low , you need a thermopile (thermocouples connected together) and a circuit to get a readable voltage at the other end.
What is voltage divider circuit?
The two resistor voltage divider is used often to supply a voltage different from that of an available battery or power supply. In application the output voltage depends upon the resistance of the load it drives.
What is voltage reading on circuit with 6 volt battery 1 ammeter 1 50 ohm resistor?
i=v/r can be used to it
How does a battery supply energy to a circuit?
The battery helps the wires complete the curcuit.
Does a battery supply the electrons in an electric circuit?
No, is it incorrect to say that a battery produces the charges that circulate in a circuit. Some might suggest that a battery is a current source, but the battery should most properly be considered a voltage source. It generates the electromotive force (emf or voltage) that causes charges to move. (It does this through electrochemical reactions.) The charges that circulate in a circuit (which might be termed the current flow) are already in the conductor and components. All the battery does is produce the voltage (the force) to move charges. Let's look at current flow and see why things might be best looked at in the manner we've stated.Note that the way a battery moves charges is to "inject" an electron into the circuit where it is tied to the negative terminal of that battery. The electron causes one electron in the circuit at the terminal to "move over" and that will cause another electron to "move over" and so on. This will continue until the "last electron" in the circuit at the positive terminal of the battery leaves the circuit and "goes into" the battery. Current flow in the circuit is like musical chairs with electrons everywhere in the circuit "moving over a space" to cause the current flow.Having gone through all that, it should be easier to see why a battery probably should not be considered the producer of charges that circulate in a circuit. Rather, the battery is the source of the voltage that drives the charges (the current) in the circuit.
What is a series circuit that is used to produce a voltage source of desired magnitude from a higher voltage battery?
Such a circuit would be called a voltage divider.The circuit would consist of two or more resistors in series across a battery or other voltage source. Each resistor would drop a certain amount of voltage (proportional to its resistance), and by considering the voltage drops, the investigator could pick two points in the circuit from which to take (or "pick off") the desired voltage needed for a project. Let's look at just one example.If a 12 volt battery has two 1K ohm resistors in series across it, each resistor will drop 6 volts. By connecting wires from each end of one resistor, the 6 volts can be "picked off" and used to do something else. Certainly there are limitations concerning how much current can be drawn from the circuit (called loading the circuit), as the "diversion" of current around the resistor that is providing the voltage will change the voltage that is being picked off. But for small amounts of current, the voltage divider will work adequately.
What is the maximum length for twisted pair cable used in telephone circuit?
300 feet Answer I believe it is many miles, when used in a teleplone circuit. They use a large battery voltage for voice over the line. 100 meters if used in an ethernet environment.
What is the purpose of a voltmeter in a circuit?
the purpose of a voltmeter is used to measure voltage in a circuit
What is a mcb and what is it used for?
mcb is master circuit breaker. it is used in the circuit for the protection of equipments from over voltage.
How do you build a transformer using a battery charger?
Ni-Cd , Ni-HM and other rechargeable batteries are in massive use now a days.Let me not describe the use , importance and bla bla of the rechargeable batteries.What we are going to talk about here is how to make simple battery charger circuit to recharge your rechargeable batteries.Making a battery charger circuit is very simple , Simply step down the mains voltage using a step down transformer and convert the current into DC and stabilize it using a bridge rectifier circuit.But you might not want to use a transformer in your circuit to maker your battery charger circuit small and handy.If you don't want to use a a transformer to step down the mains voltage then you can also use a resistor and a capacitor to step down the voltage and stabilize it.And you can see the circuit diagram of a battery charger below which is not using any transformer. Battery charger circuit diagram:So here is a simple battery charger circuit diagram:Click on the image to enlarge it:Battery charger circuit diagramYou can see the values of the components used below:R1: 56 giga ohms resistorR2: 220 Mega ohms resistorC1: 105 Kilo pico farad , 250 voltage capacitorD1: IN 4007 DiodeD2: Light emitting diode indicatorD3 : IN 4007 DiodeIf you use the values of the components stated above the circuit can recharge a 3 voltage rechargeable battery , You can change the value of R1 and C1 to get recharge battery of more voltage.
