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Exam (elaborations)

Physics JCCC Exam 1: Questions With Solutions

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Physics JCCC Exam 1: Questions With Solutions

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  • October 20, 2024
  • October 20, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • JCCC
  • JCCC
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Physics JCCC Exam 1: Questions With Solutions

All atoms except hydrogen are composed of ( ), ( ), and ( ) Right Ans -
protons
neutrals
electrons

What is neutral hydrogen composed of? Right Ans - one proton and one
electron

protons and ( ) have pretty much the same mass Right Ans - neutrons

What is the fundamental unit of charge? Right Ans - e

e= Right Ans - 1.6 x 10^-19

What is the SI unit for e? Right Ans - C (coulomb)

What objects are said to be electrically neutral? Right Ans - 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? Right Ans - e

What does q stand for? Right Ans - the charge of larger magnitude

What does N stand for in q=Ne Right Ans - integer number of e (must be a
whole number)

What is the net charge ofa carbon nucleus? Right Ans - 6 protons x e

What equation do you use to find the net charge of an element? Right Ans -
q=Ne

Definition: change is neither created nor destroyed but only transfers from
one object to another. Right Ans - Law of Conservation of Charge

According to the Law of Conservation of Charge, an isolated system is always (
) Right Ans - conserved

, Which is charged : carbon atom or carbon ion Right Ans - Carbon ion,
because you add or take away electrons

Definition: substance that readily allows for the movement of electrons
through the material Right Ans - electrical conductors

electrical conductors are usually good ( ) Right Ans - thermal conductors

Name some electrical conductors? Right Ans - metals (copper, gold,
aluminum, steel)

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

Name some good electrical insulators Right Ans - rubber, glass, wood,
ceramics, rocks

Name a semi-conducting material Right Ans - silicone

What is the charge after rubbing an ebonite rod with fur? Right Ans -
negative charge

What is the charge after rubbing a glass rod with silk or plastic? Right Ans -
positive charge

Are electrons created or destroyed? Right Ans - Nope, jsust transfered

What is the net charge of a system before and after? Right Ans - always
zero

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

What happens as you gain more electrons? Right Ans - they become
negatively charged

Placing an object in contact with ( ) allows for redistribution of charge
Right Ans - a conductor

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