Lesson 4: Cells and Batteries Flashcards
2
Q
How do the electrolyte and the metal produce electricity?
A
- Chemical reaction occurring on two surfaces of metals.
- Reactions producing electricity.
3
Q
What do batteries consist of?
A
Batteries consist of two or more cells connected together in series to provide a greater voltage.
4
Q
What 2 main factors does the voltage of a cell depend on?
A
1.) The type of electrodes
2.) The type of electrolyte.
5
Q
True or False
Cells can produce electricity for an unlimited period of time.
A
- False.
- Only for certain period. Eventually the chemicals in the cell run out and the reaction stops.
6
Q
How does the type of electrodes used affect the voltage of a cell?
A
- Greater difference in reactivity between metals produces a higher potential difference .
7
Q
Why do alkaline batteries run out at some point?
A
- In non-rechargeable cells and batteries the chemical reactions stop when one of the reactants has been used up.
- No more electricity is produced
- Reaction is irreversible.
8
Q
Why can rechargable cells and batteries be recharged?
A
- You can reverse chemical reactions when an external current is supplied.
9
Q
What do cells contain?
SPEC…
A
- Cells contain chemicals which react to produce electricity.
10
Q
A