Circuits - IB Physics

0:00 Definition and Parts of a Circuit
0:22 Common Misconception about Electrons
1:19 Voltage
1:52 Closed vs Open Circuits
2:19 Actual vs. Conventional Current
3:02 Multiple Paths
4:18 Resistors
5:02 Water Analogy

[shamelsinha]

Nice "Water Analogy", really helped out!

[cat]

that water analogy is genius!! thank you

[gregparmer-lohan]

at 0:19 cell and battery have the same definition?

[mrkhunt.]

Comparing the water analogy, is the voltage always 0 after the current passes through the last resistor? And If so, what provide the electrons the "push" to travel from the resistor back to the battery? Why don't the electrons just stop there?

[shloksingh]

If all the energy of the electrons is lost as they pass through the resistor, why doesnt the flow of electrons just stop there and then?

[phantomserhat]

Actually the electrons do not move from positive terminal to the negative terminal in a real circuit. They can just go at millimeter or cm sized distance at most in the circuit and they all have a so called drift velocity. Besides, they share the impulse to each other within this motion and the energy is propagated by the electric field applied over the circuit by the battery.