Static Electricity Flashcards
What does an atom have if it doesn’t have an equal number of protons and electrons?
Electric charge
What is “a form of charge, either positive or negative, that exerts and electrical force” ?
An electric charge
What is a negative ion?
An atom that has picked up one or more electrons
What is a positive ion?
An atom that has lost one or more electrons
What is “an imbalance of electric charge on the surface of an object” ?
Static electricity
What does static electricity produce?
What we call “static charges” because the charges are at rest on the surface of the object
What is an electroscope used for?
To detect the presence of electric charges
What does a pith ball consist of?
Plant material suspended from a stand by a thread
What is electric force?
The force exerted by an object with an electric charge: can be a force of attraction or force of repulsion
What does the law of force state?
- Objects with like charges repel each other
2. Objects with opposite charges attract each other
What happens when two neutral objects are brought together?
They are neither attracted nor repelled from one another
What happens when a charged object is brought near a neutral object? What is this called?
The electrons in the neutral object shift in position – this is called an induced charge separation
What happens if a positively charged object is brought near a neutral object?
The electrons in the neutral object move towards it
What happens if a negatively charged object has brought near a neutral object?
The electrons in the neutral object move away
A metal leaf electroscope is ____ sensitive to electric charge than a pith ball electroscope
More
What does a Metal leaf electroscope consist of?
A vertical rod, which has two thin pieces of metal foil called “the leaves”
What happens when the change to be tested is applied to the metal terminal on a metal leaf electroscope?
Electrons are transferred to or from the leaves, they receive the same charge which causes them to repel each other and spread apart
What is it when electrons in the neutral object rearrange on its surface to make what appears to be an opposite charge when in fact it remains neutral?
Temporary induction/induced charge separation
What is “ The transfer of electrons to or from a ground to create a permanent opposite charge without contact “ ?
Permanent induction
What is it when electrons in the neutral object rearrange on its surface to make what appears to be an opposite charge when in fact it remains neutral?
Temporary induction/induced charge separation
What is “ The transfer of electrons to or from a ground to create a permanent opposite charge without contact “ ?
Permanent induction
