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Questions and Answers
What is the kinetic energy of the electron when it reaches the positive bar?
What is the kinetic energy of the electron when it reaches the positive bar?
- $KE = \frac{1}{2}mv^2$ (correct)
- $KE = qEd$
- $KE = qV$
- $KE = \frac{1}{2}mv^2 + qV$
What is the required time for the electron to reach the positive bar?
What is the required time for the electron to reach the positive bar?
- $t = \frac{m}{qE}v$ (correct)
- $t = \frac{m}{qE}v^2$
- $t = \frac{qE}{m}v$
- $t = \frac{2qV}{m}$
What is the exerted force on the electron in the uniform electric field?
What is the exerted force on the electron in the uniform electric field?
- $F = qV/d$
- $F = \frac{1}{2}mv^2$
- $F = qE$ (correct)
- $F = m\cdot a$
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