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Physics JCCC Exam 1 Questions and Answers 100% Correct CA$20.18   Add to cart

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Physics JCCC Exam 1 Questions and Answers 100% Correct

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Exam of 5 pages for the course JCCC at JCCC (Physics JCCC Exam 1)

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  • October 31, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • JCCC
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Physics JCCC Exam 1

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= - answer1.6 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? - answer6 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? - answermetals (copper, gold, aluminum, steel)

Definition: substances that do not easily allow for the movement of electrons through
the material - answerelectrical insulators

Name some good electrical insulators - answerrubber, glass, wood, ceramics, rocks

Name a semi-conducting material - answersilicone

What is the charge after rubbing an ebonite rod with fur? - answernegative charge

What is the charge after rubbing a glass rod with silk or plastic? - answerpositive charge

Are electrons created or destroyed? - answerNope, jsust transfered

What is the net charge of a system before and after? - answeralways zero

Which elements on the periodic table tend to accept electrons? why? - answerFar right,
because their electron shells are almost full

What happens as you gain more electrons? - answerthey become negatively charged

Placing an object in contact with ( ) allows for redistribution of charge - answera
conductor

What happens if the charged object and conductor are identical? - answerthe charge
will redistribute equally

Which charges repulse each other : like charges or opposite charges? - answerlike
charges

Which charges are attracted to each other : like charges or opposite charges? -
answeropposite charges

What happens when you take a negative charge away from the sphere? -
answereventually everything will be neutral

When does redistribution of charge of the conducting object occur? - answerwhen 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? -
answerThe 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 - answerCoulumb's Law

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