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Exam 3- Physics

QuestionAnswer
The fluid at the bottom of a container is... under more pressure than the fluid at the top
Absolute zero may be regarded as that temperature at which... molecular motion in gas would be the minimum possible
The physics of a refrigerator most closely resembles the physics of... a heat engine
The working substance (for refrigerant) used in most refrigerators is a... gas that is easy to liquefy
Heat is absorbed by the refrigerant in a refrigerator when it... vaporizes
A refrigerator gives off... more heat than it absorbs from its contents
The greater entropy of a system of particles, the less the order of the system
The charge on an electron... is always the same
A positive electric charge... repels other positive charges
Coulomb's law for the force between electrical charges belongs in the same general category as... Newton's law of gravitation
The electric force between a proton and an electron... is stronger than the gravitational force between them
An atom consists of a... small positive nucleus surrounded at distance by electrons
The particle easiest to remove from an atom is a(n)... electron
An object has a positive electrical charge whenever... it has a deficiency of electrons
A solid conductor is one... whose electrons are free to move about
Superconductors... have no electrical resistance
The electrical energy lost when a current passes through a resistance... becomes heat
All magnetic fields originate in... moving electrical charges
The force on an electron that moves in a curved path must be... one or more of these
In a drawing of magnetic field lines, the weaker the field is, the... farther apart the field lines are
A moving electric charge produces... both an electric and a magnetic field
The magnetic field of a bar magnet resembles most closely the magnetic field of... a wire loop carrying a direct current
The magnetic field lines around a long, straight current-carrying wire are... concentric circles around the current
The nature of the force that is responsible for the operation of an electric motor is... magnetic
A transformer can change... the voltage of an alternating current
Created by: user-2024646
 

 



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