Question

An electron starting from rest moves Unimpeded in an electric field of intensity E volts per meter, find
1. The force it experiences
2. The acceleration
3. The kinetic energy attained in moving through a P.D of v volt
4. The velocity attained in moving through P.D of V volts

Answer 1

Answer on Question #84098, Physics / Electromagnetism

Question:

An electron starting from rest moves Unimpeded in an electric field of intensity E volts per meter, find

1. The force it experiences

2. The acceleration

3. The kinetic energy attained in moving through a P.D of v volt

4. The velocity attained in moving through P.D of V volts

Solution:

1. The force $f = eE$, $e$ - electron charge

2. The acceleration $a = \frac{f}{m} = \frac{eE}{m}$

3. The kinetic energy $K = eV$

4. The velocity $v = \sqrt{\frac{2K}{m}} = \sqrt{\frac{2eV}{m}}$

The answer:

1. The force $f = eE$

2. The acceleration $a = \frac{eE}{m}$

3. The kinetic energy $K = eV$

4. The velocity $v = \sqrt{\frac{2eV}{m}}$

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