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Battery Basics Quiz

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Questions and Answers

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?

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?

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?

<p>Secondary (rechargeable) batteries</p> Signup and view all the answers

What did the term 'battery' historically specifically refer to?

<p>A device composed of multiple cells</p> Signup and view all the answers

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.