Which statements are true for an electron moving in the direction of an electric field and...
Which statements are true for an electron moving in the direction of an electric field
and why? (There may be more than one correct choice.)
(a) Its electric potential energy increases as it goes from high to low potential.
(b) Its electric potential energy decreases as it goes from high to low potential.
(c) Its potential energy increases as its kinetic energy decreases.
(d) Its kinetic energy decreases as it moves in the direction of the electric field.
(e) Its kinetic energy increases as it moves in the direction of the electric field.
Homework Answers
(a) Its electric potential energy increases as it goes from high to low potential..
(c) Its potential energy increases as its kinetic energy decreases.
(d) Its kinetic energy decreases as it moves in the direction of the electric field.
Reason- force on the electron acts in opposite direction of electric field , thereby reducing its velocity and kinetic energy. From energy conservation, sum of kinetic and potential energy is constant. Therefore, potential energy increases.
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