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joel amos
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Homework Statement
I am supposed to determine the potential differences between the points. However, I thought circuits had to be closed...
So how then do I calculate potential difference without current?Stephen Tashi said:If there is no current, then no voltage is dropped across each resistor.
Yes, and if I=0?joel amos said:So how then do I calculate potential difference without current?
I'd usually use the formula V = I*R.
Well, then there would be no drop in voltage. Does this mean that the potential difference at all three points is the same?gneill said:Yes, and if I=0?
Not quite. The battery will maintain a fixed potential difference regardless of current flow or not.joel amos said:Well, then there would be no drop in voltage. Does this mean that the potential difference at all three points is the same?
Yup.EDIT: Well I guess there would be current through R2.
So then would the potential difference between A and B be 9 V, the difference between A and C be 9 V, and the difference C and B be 0 V?
joel amos said:So how then do I calculate potential difference without current?
Circuits need to be closed in order for electricity to flow and for the circuit to function properly. When a circuit is closed, it forms a complete loop, allowing the flow of electrons from the power source to the load and back again.
If a circuit is not closed, it is considered an open circuit and electricity cannot flow. This means that the load, such as a light bulb, will not receive any power and will not turn on.
No, a circuit must be completely closed for electricity to flow. If there is a break or gap in the circuit, the flow of electrons will stop and the circuit will not work.
A circuit can be closed by connecting all the components in a loop using conductive materials, such as wires, and ensuring that there are no breaks or gaps in the circuit.
In some cases, circuits may be designed to have switches or breakers that can open and close the circuit. However, these switches must be closed in order for the circuit to function properly.