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Recent questions in Programming Paradigms
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conney
over 13 years ago
Programming Paradigms
"Explain how these statements can both be true. Does one particular electron move from one end of the conductor to the other?"
In a conductor, changes in the electric field that drives the electrons through the conductor propagate with a speed close to the speed of light, although the drift velocity of the electrons is very small.
3
paulina
over 13 years ago
Programming Paradigms
"Imagine now that we have two infinitely large flat sheets of insulating material. One is charged and the other is neutral. If these are brought into contact, will an attractive force exist between them, as there was for the balloon and the wall?"
A common demonstration involves charging a rubber balloon, which is an insulator, by rubbing it on your hair, and touching the balloon to a ceiling or wall, which is also an insulator. The electrical attraction between the charged balloon and the neutral wall results in the balloon sticking to the wall.
2
paulina
over 13 years ago
Programming Paradigms
"What can you conclude about the net electric flux through a Gaussian surface placed in this region of space?"
A uniform electric field exists in a region of space in which there are no charges.
2
thecoral
over 13 years ago
Programming Paradigms
"When held over a flame, the paper in contact with the wood burns but the half in contact with the metal does not. Explain."
A piece of paper is wrapped around a rod made half of wood and half of copper.
1
paulina
over 13 years ago
Programming Paradigms
"What can you conclude about the net electric flux through a Gaussian surface placed in this region of space?"
A uniform electric field exists in a region of space in which there are no charges.
2
paulina
over 13 years ago
Programming Paradigms
"Imagine now that we have two infinitely large flat sheets of insulating material. One is charged and the other is neutral. If these are brought into contact, will an attractive force exist between them, as there was for the balloon and the wall?"
A common demonstration involves charging a rubber balloon, which is an insulator, by rubbing it on your hair, and touching the balloon to a ceiling or wall, which is also an insulator. The electrical attraction between the charged balloon and the neutral wall results in the balloon sticking to the wall.
2
conney
over 13 years ago
Programming Paradigms
"Explain how these statements can both be true. Does one particular electron move from one end of the conductor to the other?"
In a conductor, changes in the electric field that drives the electrons through the conductor propagate with a speed close to the speed of light, although the drift velocity of the electrons is very small.
3
thecoral
over 13 years ago
Programming Paradigms
"When held over a flame, the paper in contact with the wood burns but the half in contact with the metal does not. Explain."
A piece of paper is wrapped around a rod made half of wood and half of copper.
1
Programming Paradigms