The cathode is which of the following?

• A. Negatively charged electrode
• B. Positively charged electrode
• C. Electrically insulated electrode
• D. A neutral electrode

Answer: (A)

The cathode is defined by where reduction occurs—the electrode that gains electrons. In electrolysis, electrons are directed to the cathode, so it carries a negative charge. That’s why this option identifies the cathode as the negatively charged electrode. Remember, the sign of the cathode can differ in galvanic cells, where the cathode is positive, but for this context the cathode is the negatively charged electrode because it’s the site of reduction receiving electrons.