In a region of space the potential at point A is -5.00v and the potential at poi

Question

In a region of space the potential at point A is -5.00v and the potential at point B is 14.00v. A. What is the change in potential energy for an electron (q= -e, m= 9.10x10^-31kg) in moving from point A to B? B. What is the change in kinetic energy for an alpha particle (q= +2e, m=6.68x10^-27kg) that moves from point A to B?
In a region of space the potential at point A is -5.00v and the potential at point B is 14.00v. A. What is the change in potential energy for an electron (q= -e, m= 9.10x10^-31kg) in moving from point A to B? B. What is the change in kinetic energy for an alpha particle (q= +2e, m=6.68x10^-27kg) that moves from point A to B?
A. What is the change in potential energy for an electron (q= -e, m= 9.10x10^-31kg) in moving from point A to B? B. What is the change in kinetic energy for an alpha particle (q= +2e, m=6.68x10^-27kg) that moves from point A to B?

Explanation / Answer

a) The change in potential energy for an electron moving from point A to B

delta V = - q * Ex * delta X

delta V = - ( - 1.60 *10^-9) *1.50*10^5 * ( 14+ 5) = 45.6 * 10^ -4 J

B) The change in kinetic energy for an alpha particle moving from A to B

delta Ek = q * delta V = 2 *1.60*10^-9 * 45.6 *10^-4 = 145.92 * 10^-13J = 1.459*10^-15 J

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