Ace the 2025 Bennett Mechanical Comprehension Challenge – Tune Your Gears for Success!

The correct answer is the cathode because it is the electrode through which current flows out of a device in electrochemical cells or in vacuum tubes. In the context of electronic devices, the cathode typically serves as the negative terminal, allowing electrons to exit the device and contribute to the external circuit.

The anode, on the other hand, is where the current enters the device. It is the positive terminal in electrochemical reactions, where oxidation occurs. This means the anode is the source of electrons, while the cathode is where they are consumed or flow out.

The transformer and resistor don’t directly relate to the flow of current in the same way. A transformer is used to change the voltage of alternating current and does not have electrodes that allow current to flow in or out, while a resistor is a passive component that limits or regulates the flow of electric current but does not serve as a point of current exit from a device.