P4- Radiation For Life Flashcards
In a stable, neutral atom, what is there?
The same amounts of positive and negative charges.
An atom consists of…
A small positively charged nucleus surrounded by an equal number of negatively charged electrons.
All electrostatic effects are due to…
The movement of electrons
The law of electric charge states that…
Like charges repel, unlike charges attract.
What happens when a polythene rod is rubbed with a duster?
Electrons are transferred from the duster to the polythene, making the polythene rod negatively charged.
What happens when an acetate rod is rubbed with a duster?
Electrons are transferred from the acetate to the duster, leaving the acetate rod positively charged.
In general,can object has… (Charges)
A negative charge due to an excess of electrons
A positive charge due to a lack of electrons
Atoms or molecules that have become charged are…
Ions
When could a spark from static electricity cause an explosion?
When Inflammable gasses or vapours are present, or there is a high concentration of oxygen, a spark from static electricity could ignite the gasses/vapours and cause an explosion.
If a person touches something at a high voltage, what happens?
Large amounts of electric charge may flow through their body to earth. (Earth the charge)
Even small amounts of charge flowing through the body can be…
Fatal
