Question: Exercise 1 How much work does the electric field do in moving a proton from a point with a potential of +155 V to a

Exercise 1

How much work does the electric field do in moving a proton from a point with a potential of +155 V to a point where it is -60 V ? Express your answer in joules. (Answer in two significant figures) Wba=?J

2-Express your answer in electron volts.( two significant figures) Wba=? eV

Exercise 2

What potential difference is needed to give a helium nucleus (Q=2e) 45.0 keV of kinetic energy? (Express answer with the appropriate units) Delta V=? Exercise 3

1-What is the speed of an electron with kinetic energy 870 eV? (Answer in two significant figures and units)

2-What is the speed of an electron with kinetic energy 0.44 keV? (Answer in two significant figures and units)

Exercise 4

Three point charges are arranged at the corners of a square of side L as shown below

Exercise 1How much work does the electric field do in moving a

proton from a point with a potential of +155 V to a

Two identical + 9.0 uC point charges are initially 2.5 cm from each other.-20 +30 A

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