# Questions tagged [batteries]

Devices to store chemical energy and convert it to electrical energy.

46 questions
2answers
6k views

3answers
68 views

### Case where potential difference causes no current

why current will not flow from battery if I connect positive terminal of battery to ground even when there is potential difference
5answers
2k views

### Can a capacitor be charged without having resistance in the circuit?

I was looking for the fact when a capacitor is directly connected to battery without resistor what will happen? If possible then tell the time for charging.
1answer
84 views

### Why do we use the term “voltage” for a battery?

Voltage or potential difference is the difference of potential energy of two points in space per unit charge in an electric field. A battery creates an excess in electrons in one side and a lack in ...
1answer
965 views

### Emf Independent of External and Internal Resistance

Suppose a cell having emf, V and terminal voltage V' having internal resistance, r connected with an external resistance, R in the circuit in which current, I flows. We know that V=V'+Ir Can anyone ...
3answers
232 views

### What is the voltage at every pair of points along a ideal wire that is connecting the two terminals of a battery?

If you stick a wire across a battery, obviously it is going to discharge the battery. This will be due to a voltage difference between the two terminals. However, the equation $V = IR$ tells you how ...
1answer
1k views

### EMF of an ideal cell

I know it's a very stupid question but I am confused a little bit right now. An ideal cell has constant EMF of 7V. When connected in a circuit, the voltage across the cell decreases to 5V. Can i say ...
3answers
105 views

### Could this open electric circuit work?

Two batteries are interfaced by a resistor. Parameters such as resistance can be set arbitrarily. Does it work?
2answers
362 views

### Batteries connected in Parallel

"If we connect two batteries in parallel, the battery with higher voltage will discharge into the other one." What is the intuition behind this?