- 20
- 0
What do we mean when we say that voltage drops across a resistor?and what does it mean when we say that a point is at lower potential as compared to some other point?Can we say that potential is potential energy per unit charge?
We mean that the voltage is lower at one end of the resistor than it is at the other end.What do we mean when we say that voltage drops across a resistor?
We mean that one point has a lower voltage than another point.and what does it mean when we say that a point is at lower potential as compared to some other point?
Thanks now I am able to interpret. Can we say that after battery creates a potential diiference, electron gains potential energy as it passes through it and the difference in potential energy per unit charge between two pointsis called voltage between the two points. Am I right?To add to @phinds's response
We mean that one end of the resistor is at a lower electrostatic potential than the other. Note that the convention in circuits is that straight lines are considered equipotentials. Here is a gravitational analogy to help you picture it. A straight line in a circuit is like walking a horizontal corridor - no change in gravitational potential energy. Stairs are like resistors. If you encounter stairs going up, you have a rise in gravitational potential from the bottom of the stairs to the top. If you encounter stairs going down, you have a drop in gravitational potential from the top of the stairs to the bottom. The same idea applies to electric potential. BTW, if you walk inside a building and visit various people on various floors but eventually end up where you started, the sum of all your potential rises and drops is zero. The same applies to charge carriers in electric circuits and the idea is called Kirchhoff's Voltage Law (KVL).
Recall that the unit of voltage is the volt, which is equal to one joule per coulomb. So if you have a one volt battery, an electron passing through it will gain potential energy equal to the voltage of the battery times the charge of the particle. So yes, the particles passing through batteries will gain potential energy, but the magnitude of this energy gain is dependent on the charge of the particle.Thanks now I am able to interpret. Can we say that after battery creates a potential diiference, electron gains potential energy as it passes through it and the difference in potential energy per unit charge between two pointsis called voltage between the two points. Am I right?
NoCan we say that after battery creates a potential difference, the electron gains potential energy as it passes through it
Forget you ever heard the word "electron". They are irrelevant to circuit theory.I am a bit confused whether electron passes through a battery or no. My book says battery pumps electrons so it should be the case am I right?
amenForget you ever heard the word "electron". They are irrelevant to circuit theory.