Exam 8: Light and Electromagnetism

What should be the resistance of a light bulb in order for it to draw a 2 amp current when plugged into a 120- volt outlet?

A charged particle is placed at rest in the middle of a vacuum chamber, an enclosure that has been emptied of all matter. Consider some point X near a particular corner of the chamber. Neglecting all influences other than the charged particle, what can be said regarding electric fields and electric forces at point X?

If two objects each carrying a charge of 1 coulomb were placed 1 meter apart, how much force would they exert on each other?

Faraday's law tells us that

Two transparency sheets are rubbed with tissue paper and then the two transparency sheets are held up near each other. This experiment demonstrates that

The magnetic forces exerted by a permanent magnet are due to

In an isolated battery (not connected to an electrical circuit),

A proton moves through a small box that is isolated from all external influences and that has no matter inside it other than the single proton. Which of the following would we expect to find at some other point X [away from the proton] inside the box?

If you rub two transparency sheets with tissue and then hold the two transparency sheets at rest a short distance apart, they will then exert

At the microscopic level, electric currents in wires are due to

An atom loses its two outermost electrons. How does the resulting ion behave when it is near a positively charged transparency? How does the ion behave when it is near a negatively charged tissue?

Suppose you electrically charge a transparency by rubbing it, and then hang the transparency, at rest, by a string in the center of a room. Except for the transparency and string, the room is totally evacuated of all matter. Neglecting any influences from outside the room, what kinds of forces would then be found at places inside the room but away from the transparency-- for instance, at a point near a corner of the room?

A charged particle is placed at rest in the middle of a vacuum chamber, an enclosure that has been emptied of all matter. Consider some point X near a particular corner of the chamber. Neglecting all influences other than the charged particle, what can be said regarding electric fields and magnetic fields at point X?

When a transparency sheet is rubbed with a tissue and the transparency and tissue are then held at rest a short distance apart,

The "atomic number" of an element that appears in the periodic table of the elements represents

The planetary model of the atom is a more detailed, or sophisticated, model than the simpler Greek model of the atom. The planetary model is useful because, unlike the Greek model, it can explain

Of the four known fundamental forces, the one that holds electrons into their orbits in atoms is

A battery's "voltage" is

Is the force holding the electrons into their atomic orbits in an individual atom basically the same as the force that hold the sun's planets in their orbits? Why or why not?

Suppose you electrically charge a transparency by rubbing it, and then hang the transparency, at rest, by a string in the center of a room. Except for the transparency and string, the room is totally evacuated of all matter. Neglecting any influences from outside the room, what kinds of fields would then be found at places inside the room but away from the transparency-- for instance, at a point near a corner of the room?