MHB Why is the voltage in an ideal battery equal to that in an open circuit?

  • Thread starter Thread starter Mango12
  • Start date Start date
  • Tags Tags
    Batteries
Mango12
Messages
48
Reaction score
0
question: referencing ohm's law, why is the voltage in an ideal battery equal to that in an open circuit?

I know ohm's law, and I know that an ideal battery has the same voltage no matter what it's connected to, but what does that have to do with an open circuit?
 
Mathematics news on Phys.org
Mango12 said:
question: referencing ohm's law, why is the voltage in an ideal battery equal to that in an open circuit?

I know ohm's law, and I know that an ideal battery has the same voltage no matter what it's connected to, but what does that have to do with an open circuit?

Hi Mango12! ;)

A real battery loses some of its voltage in a closed circuit.
Putting a load on real battery has its effect.
However, even a real battery behaves like an ideal battery if there's no load on it - that is, if we have an open circuit.
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Fermat's Last Theorem'

Fermat's Last Theorem has long been one of the most famous mathematical problems, and is now one of the most famous theorems. It simply states that the equation $$ a^n+b^n=c^n $$ has no solutions with positive integers if ##n>2.## It was named after Pierre de Fermat (1607-1665). The problem itself stems from the book Arithmetica by Diophantus of Alexandria. It gained popularity because Fermat noted in his copy "Cubum autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et...
View full post »

Thread 'Useless continued fraction for 1'

I'm interested to know whether the equation $$1 = 2 - \frac{1}{2 - \frac{1}{2 - \cdots}}$$ is true or not. It can be shown easily that if the continued fraction converges, it cannot converge to anything else than 1. It seems that if the continued fraction converges, the convergence is very slow. The apparent slowness of the convergence makes it difficult to estimate the presence of true convergence numerically. At the moment I don't know whether this converges or not.
View full post »

Similar threads

Ohm's Law - Finding Source Voltage
Replies
3
Views
1K
B The voltage between two points
Replies
11
Views
2K
Current through a circuit when the key is open
Replies
42
Views
5K
The battery voltage drops when fed to the DC booster circuit
Replies
3
Views
1K
MHB How to find currents and voltages with 2 batteries connected?
Replies
1
Views
2K
Why do the headlights on the car become dim when the car is starting?
Replies
4
Views
2K
Why is source force + electrostatic force = 0 inside battery?
Replies
10
Views
1K
I An attempt to understand the associated variable conventions in circuits
Replies
1
Views
2K
At the atomic level, why is voltage added when batteries are connected in series?
Replies
2
Views
2K
Equation for the Internal Resistance of a Battery
Replies
5
Views
3K

Hot Threads

Recent Insights

Back
Top