Idk Flashcards
Define electrochemical cells
Convert chemical energy into electric energy
Electrochemical cells are devices that generate electric energy through chemical reactions.
What are electrochemical cells commonly called?
Batteries
Batteries are a type of electrochemical cell that store and provide electrical energy.
What is the purpose of electrochemical cells?
Store portable energy
Electrochemical cells are used in various applications to provide energy where needed.
Label the following diagram components of an electrochemical cell: _______
carbon rod, negative terminal, electrolyte/paste, plastic insulator, positive terminal, lead plate
These components are essential for the functioning of an electrochemical cell.
What are the two terminals of a battery called?
Positive and negative
These terminals are also referred to as electrodes.
What are electrodes made of?
Two different types of metal: zinc and copper
The specific metals used can vary depending on the battery type.
What surrounds the electrodes in a battery?
An electrolyte
The electrolyte is a substance that conducts electricity.
What happens to the copper electrode when a battery is in use?
It becomes positively charged
This occurs due to chemical reactions that pull electrons off the copper electrode.
When there is a completed circuit, where do the electrons flow from?
From the negative terminal towards the positive terminal
Give examples of objects that use dry cells.
Laptop, battery
Dry cells are commonly used in portable electronic devices.
What is the electrolyte in a dry cell?
A moist, dark substance
Give examples of objects that use wet cells.
Car batteries
Wet cells are often used in larger applications like vehicles.
What is the electrolyte in a wet cell?
A liquid solution
Define energy.
The ability to do work
In what units is energy measured?
Joules (J)
What is the difference between kinetic and potential energy?
Kinetic Energy: energy in motion; Potential Energy: energy that’s stored
Define electric potential energy.
Electric energy stored
What is the amount of electric potential energy per one coulomb called?
Potential difference
What instrument is used to measure potential difference?
Voltmeter
What are the units of measurement for potential difference?
Volts (V)
Define electric circuit
A complete pathway that allows electric current to flow.
This includes a source, load, and conductors.
Define electric load
Anything connected to the circuit.
This can include devices like light bulbs or motors.