(Electricity 01) Static Electricity Flashcards
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What is static electricity?
Electric charge that remains “static” or doesn’t move.
Involves the transfer of electric charge by rubbing or friction (e.g. walking across a carpet, combing your hair)
What is electrostatics?
The study of electric charge.
How can you create a static charge?
Friction.
What is the law of attraction?
When a negatively charged object is brought close to a positively charged object, the two objects attract each other.
OPPOSITES ATTRACT
What is the law of repulsion?
When two objects with the same charge are brought together, they repel.
SAME CHARGE = NO ATTRACTION
Positive objects have a . .
Weak hold on electric charges.
Negative objects have a . .
Strong hold on electric charges.
T or F: An object that has more protons than electrons is positively charged.
True.
T or F: An object that has fewer protons than electrons is positively charged.
False.
T or F: An object that has more electrons than protons is positively charged.
False - it is negatively charged.
What is friction?
Transfer of electrons, gaining or losing electrons.
Why are the charges static?
The charges are static because they remain fixed in one location on the surface of the object.
What charge does an object with a deficit of electrons (fewer than protons) have?
A positive charge.
What charge does an object with an excess of electrons have?
A negative charge.
What charge does a proton have?
Positive charge.
What charge do neutrons have?
No charge.
What charge do electrons have?
Negative charge.
What kind of materials tend to gain electrons?
Teflon, plastic wrap, rubber balloon.
What kind of materials tend to lose electrons?
Human hand, glass, human hair, nylon.
Atoms can become charged when electrons move from one object to another.
What is the electric charge that builds up on an object?
static charge or static electricity.
What is induction?
Transferring an electric charge from one substance to another without direct contact.
When a charged object is close to a neutral object, the electric field of the charged object produces a force on the neutral object.
The charged object causes (induces) electrons in the neutral object to move.
What is Grounding?
Groundingis connecting the charged object to the earth so electrons can travel to the ground.
What is an electrical discharge?
When electric charges are transferred very quickly.
Ex. sparks, lightning
What is an electric field?
A property of the space around a charged object, where the effectof its charge can be felt by other objects.
Objects with greater net charge have ______
Stronger electric fields.
