Static Electricity Gr.9 Flashcards
__________ are the only subatomic particles that move.
Electrons
List the three subatomic particles.
Protons (positive charge)
Neutrons (neutral charge)
Electrons (negative charge)
What is static electricity?
Static electricity is a buildup of fixed electric charges without a continuous flow.
If an atom has the same number of protons and electrons, it is ________
Neutral
If an atom has more electrons than protons, it is
Negative
If an atom has less electrons than protons, it is _________
Positive
What is an insulator?
An insulator is a material that resists or blocks the movement of electrons.
What is a conductor?
A conductor is a material that allows electrons to flow freely through it.
Give 3 examples of insulators.
Air, wood, and glass.
Give 3 examples of conductors.
Copper, steel, and aluminum.
What does grounding prevent and how?
Grounding prevents electrical shock, because an object connected to the Earth can supply a very large amount of electrons to it. This removes the object’s electrons and neutralizes it.
What is an electroscope?
It is a device used for detecting the presence of an electrical charge.
Would a pith ball electroscope go towards or away from a positively charged object?
Towards.
Would a pith ball electroscope go towards or away from a negatively charged object?
Away.
When a negatively charged object touches a neutral object, the neutral object becomes ________.
Negative.
When a positively charged object touches a neutral object, the neutral object becomes _________.
Positive.
Net charge describes __________________.
The amount of electrons in the atoms.
True or false: Positives cannot move because they are inside the nucleus.
True
Like charges _______.
Repel.
Opposite charges __________.
Attract.
Charging by induction
Charging by induction happens when charges in an uncharged object are rearranged without direct contact with the charged object.
Is charging by induction is temporary or permanent?
Temporary. Once the charged object is moved away, the electrons will move back to their original positions.
