29 Questions
What is the result of an imbalance between negative and positive charges in an object?
Static electricity
What happens when two negatively charged balloons are brought together?
They repel each other
Who named the two different kinds of electric charge?
Benjamin Franklin
What is the fundamental principle of electric charge?
Electric charge is conserved
What is the term for the science of static electricity?
Electrostatics
What is the result of an object having an equal amount of positive and negative charge?
The object becomes neutral
What is the location of protons and neutrons in an atom?
In the center of the atom, called the nucleus
What is the result when an electron is transferred from one neutral atom to another?
The second atom gains a negative charge and the first atom loses a negative charge
What is the principle that is demonstrated by the conservation of electric charge?
Principle of conservation of charge
What did Robert Millikan find in his oil drop experiment in 1909?
The charge of an object is always a multiple of a fundamental unit of charge
What is the symbol for the fundamental unit of charge?
e
What is the charge of a proton?
+e
What is the primary mechanism for charging insulators?
Friction
What is the characteristic of superconductors at or below a certain temperature?
Zero electrical resistance
What is the approximate number of excess electrons in a typical lightning bolt with 5 C of charge?
3.125 × 10^18 electrons
Which type of material is characterized by electrical properties between those of insulators and conductors?
Semiconductors
What is the process of charging conductors?
Conduction
What is the typical state of most objects in terms of electric charge?
Electrically neutral
What is the primary method of transferring electrons in conduction?
Through direct contact between objects
What happens to the electrons on the metal sphere when it is grounded?
Some of them travel through the wire to the ground
What is the result of charging an object by induction?
The object develops an opposite charge to the original charged object
What is polarization in the context of charging an object?
The effect of more positive/negative charge accumulating on one side of an insulator
Why does the charged rubber rod not lose its negative charge in the process of induction?
Because the rod is not in contact with the sphere
What is the main difference between charging by conduction and charging by induction?
The transfer of electrons through direct contact or not
What is the net charge of an insulator that has been polarized?
Zero
How can a conductor be charged?
Either by contact or induction
What is the effect of like charges on each other?
They repel
What is the fundamental unit of charge?
The magnitude of the charge of an electron
What happens when a charged object is brought near an insulator?
The insulator is polarized
Understand the properties of electric charge, differentiate between conductors and insulators, and distinguish between charging methods. Explore electrostatic spray painting and its efficiency.
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