Neither one is "better" than the other, it simply means the circuit will have a different layout/components if you choose one over the other.
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The Anode (+) is what you connect the positive voltage to The Cathode (-) is what you connect the negative voltage to.
"from anode to cathode". Normally, no. Taking a radio valve (electron tube), since the anode is positive compared to the cathode, and since electrons flow from surplus (at the negative cathode) to deficiency (at the positive anode), they do *not* flow from anode to cathode in normal operation. It's possible to have electrons striking the anode and *knocking off* electrons from it, and then to have those electrons travelling back towards the cathode. This is secondary emission. It was a problem in four-element "tetrode" valves in the early days, but has now been eliminated in practical designs. Long story short: it's possible, but undesirable and not common.
A positive electrode is a cathode. A negative electrode is an anode.An anode is positively charged, while a cathode is negatively charged.
When the area provided to the cathode is smaller than the anode the electrons will still flow.
two, cathode & anode