Would be AWESOME if someone could help with this

  • Thread starter wayneinsane
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In summary, two parallel plates with a distance of 9.0 cm between them produce a uniform electric field of 3.0 × 104 N/C. The bottom plate is positively charged while the top plate is negatively charged. In a vacuum between the plates, an electron starting at rest on the upper plate will experience a force and acceleration due to the electric field. To find the time required for the electron to reach the lower plate, the formulas for force and acceleration can be used.
  • #1
wayneinsane
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Two parallel plates are 9.0 cm apart. The bottom plate is charged positively and the top plate is charged negatively, producing a uniform electric field of 3.0 × 104 N/C in the region between the plates. What is the time required for an electron, which starts at rest at the upper plate, to reach the lower plate? (Assume a vacuum exists between the plates.)
 
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  • #2
The electric field causes a force on the electron, which causes it to accelerate. You will need the formula for each "causes". Also, accelerated motion formulas to find the time once you know the acceleration. Have a go at it!
 
  • #3


It is possible to calculate the time required for an electron to reach the lower plate in this scenario. Using the equation for the force on a charged particle in an electric field (F=qE), we can calculate the force on the electron (q=-1.6 x 10^-19 C) as -4.8 x 10^-15 N. Then, using Newton's second law (F=ma), we can calculate the acceleration of the electron as -3.2 x 10^14 m/s^2. Finally, using the equation for distance traveled with constant acceleration (d=1/2at^2), we can calculate the time required for the electron to reach the lower plate as approximately 5.8 x 10^-8 seconds. This calculation assumes that the electron experiences no resistance or other external forces during its journey.
 

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