1. What are the units for ? - [T] - [C] - [kg] - [C / kg] - [mT] - None of these
ID: 1268121 • Letter: 1
Question
1. What are the units for ?
- [T]
- [C]
- [kg]
- [C / kg]
- [mT]
- None of these
- [kg / C]
2. Should we include the force of gravity in our error analysis? (After all, gravity does affect the electrons.)
A) Yes, if we want to use three decimals in our answers, gravity certainly plays a role.
B) No Way! the weight from gravity is many orders of magnitude less than the force from the moving charge through the magnetic field.
3. Should we include the Earth's magnetic field in our error analysis?
A) No, the Earth's field is way too small to change the path of the electron.
B) Yes, the Earth's field and the coils' field will add up to make a net field that influences the electron.
4. You are looking at the cross section of a coil. The conventional current is traveling clockwise. Which way is the magnetic field traveling?
A) Into the coil (away from you).
B) Out of the coil (towards you)
C) More information is needed within the question.
D) There will be no field because there is no moving charge.
5. According to the manual, what is the angle between the magnetic field and the velocity of the electron?
- 180 degrees
- 3 ? / 2 radians
- 90 degrees
- 45 degrees
- 2? radians
- All of these because it depends on where the electron is at the time.
- 30 degrees
6. Given a current of 2[A]; a coil radius of 0.16[m]; and N=130, then what is the strength of the magnetic field in milliTeslas?
7. Let's say that you are given a magnetic field
B = 0.00146[Teslas]. You also have an
average V / d2 = 47428[V/m2];
what is the value for e / m ?
8. What do the positive helium ions do for the e / m apparatus? Choose the most complete, best answer.
- They help focus the electron beam.
- They emit photons which allow the beam to be seen.
- They get hot and glow.
- They are there only when the electrons are not orbiting, otherwise, they move to the outer edge of the bulb.
- They help focus the electron beam and they emit photons which allow the beam to be seen.
- They are there so that the bulb does not implode.
9. When is a charge acted upon by a magnetic force?
- When the charge moves within a magnetic field.
- When the charge is negative.
- When the charge is positive.
- When the chage is close enough AND stationary.
- Never, charges respond only to electric fields
- When the charge is close enough to the magnetic field to feel it.
Explanation / Answer
1-[C / kg]
2-No Way! the weight from gravity is many orders of magnitude less than the force from the moving charge through the magnetic field.
3-Yes, the Earth's field and the coils' field will add up to make a net field that influences the electron.
4-Into the coil (away from you).
5-90 degrees
6-1.46
9-When the charge moves within a magnetic field.
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