Exam (elaborations)
Physics JCCC Exam 1 Questions and Answers
- Course
- Institution
Physics JCCC Exam 1 Questions and Answers
[Show more]
Content preview
Physics JCCC Exam 1 Questions andAnswers
All atoms except hydrogen are composed of ( ), ( ), and ( ) - Answer-protons
neutrals
electrons
What is neutral hydrogen composed of? - Answer-one proton and one electron
protons and ( ) have pretty much the same mass - Answer-neutrons
What is the fundamental unit of charge? - Answer-e
e= - Answer-1.6 x 10^-19
What is the SI unit for e? - Answer-C (coulomb)
What objects are said to be electrically neutral? - Answer-An object or atom with zero
net charge (equal number of positive and negative charges that cancel each other out)
What is the smallest amount of free charge? - Answer-e
What does q stand for? - Answer-the charge of larger magnitude
What does N stand for in q=Ne - Answer-integer number of e (must be a whole number)
What is the net charge ofa carbon nucleus? - Answer-6 protons x e
What equation do you use to find the net charge of an element? - Answer-q=Ne
Definition: change is neither created nor destroyed but only transfers from one object to
another. - Answer-Law of Conservation of Charge
According to the Law of Conservation of Charge, an isolated system is always ( ) -
Answer-conserved
Which is charged : carbon atom or carbon ion - Answer-Carbon ion, because you add or
take away electrons
Definition: substance that readily allows for the movement of electrons through the
material - Answer-electrical conductors
electrical conductors are usually good ( ) - Answer-thermal conductors
, Name some electrical conductors? - Answer-metals (copper, gold, aluminum, steel)
Definition: substances that do not easily allow for the movement of electrons through
the material - Answer-electrical insulators
Name some good electrical insulators - Answer-rubber, glass, wood, ceramics, rocks
Name a semi-conducting material - Answer-silicone
What is the charge after rubbing an ebonite rod with fur? - Answer-negative charge
What is the charge after rubbing a glass rod with silk or plastic? - Answer-positive
charge
Are electrons created or destroyed? - Answer-Nope, jsust transfered
What is the net charge of a system before and after? - Answer-always zero
Which elements on the periodic table tend to accept electrons? why? - Answer-Far
right, because their electron shells are almost full
What happens as you gain more electrons? - Answer-they become negatively charged
Placing an object in contact with ( ) allows for redistribution of charge - Answer-a
conductor
What happens if the charged object and conductor are identical? - Answer-the charge
will redistribute equally
Which charges repulse each other : like charges or opposite charges? - Answer-like
charges
Which charges are attracted to each other : like charges or opposite charges? - Answer-
opposite charges
What happens when you take a negative charge away from the sphere? - Answer-
eventually everything will be neutral
When does redistribution of charge of the conducting object occur? - Answer-when the
charged object is brought near a grounded, conducting object
What happens when a positive sphere is grounded and a negative rod is placed on it? -
Answer-The electrons go to the ground
Definition: Point charges that are positively and negatively charged exert electrostatic
forces on one another in accordance with Coulumb's law - Answer-Coulumb's Law
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller lectknancy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82215 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now