Podcast
Questions and Answers
In an electrochemical cell, what role does the electrolyte play?
In an electrochemical cell, what role does the electrolyte play?
- It conducts electricity between the electrodes. (correct)
- It acts as an insulator, preventing electron flow between electrodes.
- It provides the mechanical support for the electrodes.
- It neutralizes the charge build-up on electrodes.
What differentiates a primary cell from a secondary cell?
What differentiates a primary cell from a secondary cell?
- Primary cells operate at higher voltages than secondary cells.
- Primary cells are larger in size than secondary cells.
- Primary cells cannot be recharged, while secondary cells can. (correct)
- Primary cells use different electrode materials.
If a device converts thermal energy into electrical energy, what is it called?
If a device converts thermal energy into electrical energy, what is it called?
- Battery
- Electrochemical cell
- Thermoelectric generator (correct)
- Electromagnet
In an electrochemical cell, which electrode gives up electrons and what is its charge?
In an electrochemical cell, which electrode gives up electrons and what is its charge?
What is the main difference between 'Alternating Current' (AC) and 'Direct Current' (DC)?
What is the main difference between 'Alternating Current' (AC) and 'Direct Current' (DC)?
Which energy conversion is the primary function of a battery?
Which energy conversion is the primary function of a battery?
What is a battery, in terms of electrochemical cells?
What is a battery, in terms of electrochemical cells?
What is the fundamental principle behind how generators create electricity?
What is the fundamental principle behind how generators create electricity?
How does an electromagnet achieve its strength?
How does an electromagnet achieve its strength?
What distinguishes a 'wet cell' from a 'dry cell'?
What distinguishes a 'wet cell' from a 'dry cell'?
Flashcards
Battery Conversion
Battery Conversion
Transforms chemical energy into electrical energy.
Thermoelectric Generator
Thermoelectric Generator
A device that converts heat energy into electrical energy.
Electrolyte
Electrolyte
A fluid or chemical paste that conducts free electrons in an electrochemical cell.
Electrodes
Electrodes
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Battery
Battery
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Negative Electrode (Anode)
Negative Electrode (Anode)
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Positive Electrode (Cathode)
Positive Electrode (Cathode)
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Wet cell
Wet cell
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Dry cell
Dry cell
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Primary Cells
Primary Cells
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Study Notes
- A battery converts chemical energy into electrical energy.
- A thermoelectric generator converts thermal energy into electrical energy.
- A battery or combustion engine converts chemical energy into mechanical, electrical, light, and sound energies.
- The International Space Station uses solar energy to generate electricity.
- The fluid or chemical paste that conducts free electrons in an electrochemical cell is called an electrolyte.
- The different metals in an electrochemical cell, one which releases electrons, and one which attracts electrons are called electrodes.
- Generators use magnetic fields or motion to create electricity.
- In an electrochemical cell with zinc and copper in an electrolyte, the electrolyte eats away the zinc electrode, leaving behind electrons that give it a negative charge.
- An electromagnet uses electric current to create its strength.
- A battery is a series of connected electrochemical cells.
- An electrochemical cell has two electrodes.
Electrochemical Cell Electrodes
- Negative electrode (anode) gives up electrons.
- Positive electrode (cathode) gains electrons.
- Electrodes are surrounded by an electrolyte, a substance like a salt solution or acid that conducts electricity.
Types of Cells
- Wet cells have a liquid electrolyte that conducts electricity between the electrodes.
- Dry cells have a solid electrolyte (paste, plastic, or a ceramic solid) that conducts electricity between the electrodes.
- Primary cells cannot be recharged.
- Secondary cells can be recharged.
Electrical Current Types
- AC stands for Alternating Current.
- DC stands for Direct Current.
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