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Cathode Rays - Statistics
General Stats
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This quiz has been taken 5 times
4 since last reset
- The average score is 14 of 35
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| What actually are Cathode rays made up of? | Electrons | 100%
|
| Which electrode glowed? | Anode | 67%
|
| What electrode did the glow originate from? | Cathode | 67%
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| What were these called? | Electrodes | 67%
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| J.J. Thomson finally proved a hypothesis regarding the actual effect of electric fields on cathode rays. What was the real electric charge of cathode rays? | negative | 67%
|
| Name a gas used when using cathode tubes for lighting? | Neon or Mercury | 67%
|
| What colour did it glow? | Pale green | 67%
|
| What was the charge of that electrode? | Positive | 67%
|
| Since this is equivalent to kinetic energy, W= | 1/2mv^2 | 33%
|
| At lower pressures, what can electrons do in cathode ray tubes? | Accelerate to faster speeds | 33%
|
| What was created when the ^ where connected to an external high-voltage source? | An Electric Current | 33%
|
| Cathode Ray Oscilloscopes | 33%
| |
| J.J. Thomson used what to create uniform magnetic and electric fields? | charged parallel plates | 33%
|
| This meant that when the radius of the path was calculated, Thomson could obtain what? | charge to mass ratio | 33%
|
| The electrons undergo what motion due to the magnetic field? | Circular motion | 33%
|
| These are separated by? | dark spaces | 33%
|
| What equation do you use to calculate the electrical field intensity using force and charge? | E=F/q | 33%
|
| Electric field strength is calculated using the formulae: | E=V/d | 33%
|
| What equation calculates the force experienced by a particle in a magnetic field when the magnetic field is perpendicular to the particle's velocity? | F=qBv | 33%
|
| What is work done equal to? | gain in energy | 33%
|
| The colours of the discharge depend on what? | gas used | 33%
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| The first effect that can be seen in cathode ray tubes is? | glow discharge | 33%
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| Plucker placed what on each end of a glass vacuum tube? | Metal Plates | 33%
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| List the two main uses of cathode ray tubes | Monitors | 33%
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| What effect explains the emission of electrons from the cathode surface? | Photoelectric effect | 33%
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| Why weren't scientists initially able to see the deflection in electric fields? | Pressure too high | 33%
|
| Since W=Fd, then W also equals: | qEd or qV | 33%
|
| If they are not perpendicular, what is the RHS of the equation multiplied by? | sine of the angle | 33%
|
| The positive column is broken into what as pressure decreases? | Striations | 33%
|
| What was concluded about cathode rays when magnets were placed on each side of the tube? | They are negative | 33%
|
| What did the paddle wheel experiment identify about cathode rays? | They have momentum and therefore mass | 33%
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| What was initially the conclusion obtained from placing electric plates on each side of the tube? | They have no charge | 33%
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| What did the Maltese Cross experiment identify about cathode rays | They travel in straight lines | 33%
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| He found this using the combined equation q/m= | v/Br | 33%
|
| By equating the magnetic and electric force equations when the beam was undeflected, Thomson was able to determine what? | velocity of the cathode ray particles | 0%
|
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