Final answer:
The anode is the positively charged electrode through which electrons pass to the cathode. In a cathode ray tube, electrons emitted from the cathode travel to the anode, and this principle is utilized in devices like TV screens and X-ray machines. In electrochemical cells, electrons flow from the anode to the cathode, powering electronic devices.
Step-by-step explanation:
The anode is a circular plate with a hole in the middle through which electrons pass to the cathode. In various applications, such as in a cathode ray tube (CRT), the cathode is the negatively charged electrode where electrons are emitted, and the anode is the positively charged electrode where electrons are collected. The flow of electrons from anode to cathode is utilized in many ways, from producing the images on a TV or computer screen to generating X-rays.
In the case of electrochemical cells, the anode is the site of oxidation and is where electrons are lost, whereas the cathode is the site of reduction and is where electrons are gained. The electrons traveling through an external circuit from the anode to the cathode can be harnessed to power electronic devices. Moreover, the cathode may increase in mass as it gains metal from the ionic solution during reduction, while the anode correspondingly decreases in mass.