Batteries Definition and 456 Threads

Hello, Apologies I am not an engineer. I am hoping to find the approximate size of a system that rotates at a torque of 0.6nm but a rotation per minute of 1rpm. Ideally this would run off of dry cell batteries (e.g. 6xAA). Roughly how big would the gear system be to drop the RPM for this? How...

I know there will be potential difference between the terminals of a battery. But when the positive terminal of a battery is connected to the negative terminal of another, will both of the connected terminals achieve the same potential? If so, what happens to the individual potential differences...

Homework Statement http://imgur.com/6Cds4YF What will the ammeter read when the switch is closed?Homework Equations V = IR The Attempt at a Solution I already calculated the emf of the battery one the left to be about 27 V. It seems that the answer to the question is as simple as using V =...

Help! I am connecting a Sergent control panel (to power a motorhome 12v/240v system), with a 1200W converter for a solar panel that trickle charges a 12v battery and a leisure battery. This would not be the problem but my truck runs on 2 batteries that run 24v. Does anyone have an idea on how...

Hi, I would like to know if it is possible to charge some batteries in this case: 4W output power, 5 V voltage DC in system that is shown in this video: Which is minimal power needed to charge batteries? Thanks

Hey Guys, there is one question which is bugging me for the last couple of weeks. I am an embedded software engineer and when it comes to very deep understanding what is going it in the electrical circuits I struggle a lot. Recently I have decided to go through the course of physics again...

1. I have heard that if you take 4 batteries and 2 non-coated wires, and run the wires + to -, with current flowing in opposing directions, with the wires in close proximity, that a magnetic field will be created between the 2 wires. Is this true? 2. Since photons have no charge, is there...

Consider two fixed (-) source charges in free space. if you look at the field at any point created by the two charges, the resulting potential is due to the superposition of the two fields. for two batteries in parallel then, what happens to the two fields at the junction such that...

Homework Statement Is the current through battery D greater than, less than, or equal to the current through battery C. Bulbs identical, and batteries ideal and identical. I took a picture of the circuit, hopefully you can see it - ignore the scribble! Homework Equations Kirchhoff's current...

Assume that this circuit has been connected as shown for a very long time. Re-draw the schematic and label the currents and voltages in and across all components including the batteries. All components are “ideal.”

Hiya, I'm a bit of an intermediate in electronics and I am moving into oscillator territory and am thinking more about "ground" rather than "the negative side of the battery". Obviously, using -ve voltage as ground has some setbacks with dc-ac oscillators as current can only flow if there is a...

Homework Statement [/B] Find the potential difference between points b and a in the circuit below I have already solved for the voltages of the two batteries (1 and 2) in the circuit (18 V and 7 V respectively) 2. Homework Equations Kirchhoff's Rules 1) Potential difference across any...

I simply wanted to know, whether we can store AC power like DC?

I would like to know what batteries are, are they just any physical thing that can have and hold electrons more to one side than the other? What are the limitations to how much charge can be held in a certain amount of space, or in a certain amount of mass? How close are we to that limitation...

Hello, concerning power supplies. I am at the stage where all the components are ready except for the batteries. The thing is, not all the components have the same voltage. My first thought was using a high voltage battery connected to a custom made Power Distribution Board which splits and...

This question pertains to all things negative and positive. Such as: batteries, wirings, and atoms. Mainly my confusion comes from the actual purpose. For instance, why does a battery need a negative and positive wire? what function does this serve? why is this distinction of negative and...

Will a high current destroy my smartphone battery? I know very little about batteries, but I'm getting really annoyed at having to wait 8 hours for my phone battery to charge (it's a 6 year old smartphone). So I was thinking of raising the 2.1A output of the charger to 3.1A without raising the...

More of a general question but thought I'd post it here. Motorcycles are notorious for losing battery charge and not starting requiring a jump or rolling start. Was looking to get one of these new Li-ion battery / jump start modules capable of starting a car (and charging a phone or tablet)...

According with this article http://en.wikipedia.org/wiki/Optoelectric_nuclear_battery Can it be possible to make a similar battery but filled with tritium and coating or painting the photovoltaic surface with luminiscent substance as is done with tritium keychains...

how some batteries can be recharged?i mean i know batteries can be recharged by reversing the direction of current flow but i want to understand the whole mechanism of recharging of cell.how reversing the direction of current flow regenerates the original reactants in secondary cell?i am 12th...

Homework Statement The question pertains to the first problem from this link https://courses.physics.illinois.edu/phys212/sp2014/practice/practice.pl?exam2/fa10 They ask for the value of "I" in terms of V1, V2, R1, and R2. Homework Equations V = IR ∑Vi = 0 [/B] The Attempt at a Solution...

I want to know if my understanding is OK. If a capacitor is connected to a battery, the voltage across the capacitor will equal the battery's voltage, but this doesn't mean the capacitance is changing. The capacitance is a function of the capacitor alone (ignoring dielectrics). Right? If I...

Homework Statement A circuit is constructed with six resistors and two batteries as shown. The battery voltages are V1 = 18 V and V2 = 12 V. The positive terminals are indicated with a + sign, The values for the resistors are: R1 = R5 = 40 Ω, R2 = R6 = 156 Ω R3 = 69 Ω, and R4 = 113 Ω. The...

How can the batteries used in solar-powered cars be different from the normal ones used in combustion cars? Also, do both of them involve electrolysis to convert chemical to electrical energy?

Hey there! Can somone please help me with this problem? The problem Translated from Swedish (sorry for possible grammatical errors): L(from Europe) travels on the Trans-Siberian railway from Moscow to Vladivostok. His lamp battery dies when he reaches Irkutsk. He buys a Russian battery and that...

Currently there exist Zinc/Bromine batteries which could be recharged many times. What about such pairs as Calcium/Bromine or Magnesium/Bromine? Could somebody predict their properties such as energy density or rechargeability?

Homework Statement I'm sorry that I have no pic, but please bear with my description. The circuit diagram is made up of 3 horizontal lines. On the top line, there's battery A, (-) on the left, (+) on the right, and an arrow going to the right (>) to show direction of current. On the...

I have a small background with AC power and am trying to understand DC. I recently considered paralleling/serializing some batteries and realized how different a DC circuit is. Since a complete circuit of a battery is + to -, thus creating a short when connecting the two. Why then is it possible...

why lithium is good for battery's. ...what the property's for lithium...

Diagram: http://gyazo.com/0b719e6d399ad894d2c48ce06d994672Homework Statement In the figure the resistances are R1 = 0.77 Ω and R2 = 1.8 Ω, and the ideal batteries have emfs ε1 = 2.1 V, and ε2 = ε3 = 3.5 V. What are the (a) current (in A) in battery 1, (b) the current (in A) in battery 2 and (c)...

Homework Statement http://prntscr.com/3cmnbx Va=20V R1=3kilo ohm R2=9kilo ohm R3=6kilo ohm R4=7kilo ohm Vb=5V It asks for the electric current for every resistance(R1-R4) Homework Equations The Attempt at a Solution To be honest the thing i want most is to ask some questions rather that...

Homework Statement two batteries A and B are connected in pareallel. A has emf of 108V and internal resistance of 3 Ω while B has emf of 120V and internal resistance of 2Ω. The battery terminal is connected to battery C in series with a 25 resistor. Battery C has emf of 30V and negligible...

Just doing a couple circuit diagrams, and my brain seems to have shorted: If you have two batteries, but they're oriented where their negative terminals are facing each other (+ -) (- +) and there's a resistor in between the two batteries, could I still resolve the two batteries by subtracting...

Homework Statement Find the terminal voltage across the 16-V battery and 8-V battery. Homework Equations V=IR The Attempt at a Solution I calculated the total current of the circuit to be 5-A, but after that I'm stuck. What I did (and it was wrong) was simply use the voltage of...

Homework Statement A circuit is constructed with five resistors and one real battery as shown above right. We model. The real battery as an ideal emf V = 12 V in series with an internal resistance r as shown above left. The values for the resistors are: R1 = R3 = 59 Ω, R4 = R5 = 79 Ω and R2 =...

What will happen if two batteries were connected in parallel, and how could the total voltage and current be distributed among the resistors? Like in this attachment considering that the internal resistance of the 12V battery is 3 ohms while the resistance of the 5V battery is 2 ohms

is there any procedure ( formulae ) to select the power rating of solar panels and ampere hour rating of batteries ?

http://reviews.cnet.com/8301-13746_7-57618329-48/glucose-based-battery-has-10-times-energy-of-lithium-researchers/?ttag=fbwp The whole article sounds great till you get to this little detail: They don't explain why that is the case, but I suppose that it would be due to crops now grown as...

If you study a DC signal under an appropriate scope, you can see the switching transitions ; a pwm signal. But if you examine a battery, no matter how high temporal resolution you reach, you see a dc signal. What might be the explanation for this? electrons are being generated by a chemical...

Hi, I want to know what is the proper methods to prolong lithium battery life: When Should I recharge the battery(at any level 90%, 70 or 40 etc)? Should I charging it fully at 100%? is true that discharging battery below 20% once each month is useful to boost battery life?

ehow explains there is more current (see below). But suppose there is a simple circuit which includes a flashlight bulb and one battery. The voltage of each battery is = 1.5V and because we are using the same bulb in the above circuit, the current should be the same. Is ehow correct...

In batteries, what exactly do we mean by negative and positive charges? My understanding is that the negative charge of the anode is basically an atom with an extra electron in the last orbital that it would need to lose to reach a more stable state. and a minus electron in the last orbit of the...

i have read around the forum that the speed of electrons in a conductor is somewhat 1mm/s if that is true , then how do galvanic cells operate ? by that rate , about 1000 electrons would come out of the conductor / sec , not only this , but it would seem like the velocity of electrons is...

Homework Statement Find the potential difference at point P in the diagram. Homework Equations V=IR ΣiVi=0 ΣIin=ΣIout The Attempt at a Solution I understand that you need to use Kirchoff's circuit laws to find the current and voltage at each resistor, but I can't comprehend how a...

I had 4 1.2 volt guys lying around in a holder. The 2 wires sticking out were lying around and I started smelling stuff. I look down and I see they are connected together and the steel points seem to be slightly melting together, the batteries were hot, did it damage them or is this okay?

Hi, I am working on a PCB design and the mock-up prototype is now done, thanks for all your help by the way! now its time to get it mobile. I am trying to add a battery (CR2032) to the design of the PCB, the thing is that I have my voltage regulator set up as so...

Homework Statement 1) You are responsible for selecting automobiles that will be used in your company’s fleet. The vehicle that you select has the following combined wind drag and rolling friction force during average operation conditions. The relationship for this force is Ff = (0.0214m +...

what happens when we connect two batteries together in a circuit on of them is higher than the other say one of them is 10 and the other is 5 if they are connected such that positives meet , as far as i know a current will flow out of the negative * even though it should flow out of the...

I’m trying to figure out how to track the energy production from a battery to a motor as in an electric car. For example, the basic and primary components of an electric car are as follows: battery > controller > electric motor > driveline ====> car moves What I’m trying to figure out is...

I want to know how we can find out the net voltage of a circuit where two batteries with different voltages are connected in parallel... Let's consider the problem stated below... If I have a circuit where there are 2 batteries in parallel(5V & 15V)... And it is connected in series with...