Podcast
Questions and Answers
What is the cathode of a battery when it is supplying power?
What is the cathode of a battery when it is supplying power?
- The positive terminal (correct)
- The negative terminal
- The terminal marked negative
- Both positive and negative terminals
What delivers the free-energy difference to the external circuit as electrical energy in a battery connected to an external electric load?
What delivers the free-energy difference to the external circuit as electrical energy in a battery connected to an external electric load?
- Electrochemical cells
- Electron source at the negative terminal
- Redox reaction (correct)
- Applied electric current
What happens to the electrode materials in primary (single-use or 'disposable') batteries during discharge?
What happens to the electrode materials in primary (single-use or 'disposable') batteries during discharge?
- They are restored by reverse current
- They remain unchanged
- They convert high-energy reactants to lower-energy products
- They are irreversibly changed (correct)
Which type of battery can be discharged and recharged multiple times?
Which type of battery can be discharged and recharged multiple times?
What did the term 'battery' historically specifically refer to?
What did the term 'battery' historically specifically refer to?
Study Notes
Battery Fundamentals
- The anode is the cathode of a battery when it is supplying power.
Energy Conversion
- The chemical energy in the battery delivers the free-energy difference to the external circuit as electrical energy in a battery connected to an external electric load.
Primary Batteries
- During discharge, the electrode materials in primary (single-use or 'disposable') batteries undergo irreversible chemical changes that make them unusable after a single use.
Rechargeable Batteries
- A secondary battery (or rechargeable battery) can be discharged and recharged multiple times.
History of Batteries
- Historically, the term 'battery' specifically referred to a group of electrochemical cells connected together to form a single unit.
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Description
Test your knowledge about the fundamentals of batteries and their function as a source of electric power for various devices. Learn about the roles of the cathode, anode, and the flow of electrons in a battery.
