In the figure below, a battery of potentialdifference V = 45 V is connected to a
ID: 1669811 • Letter: I
Question
In the figure below, a battery of potentialdifference V = 45 V is connected to a resistivestrip of resistance R = 6.6 . When anelectron moves through the strip from one end to theother, (a) in which direction in thefigure does the electron move (1 = upward, 2 =downward), (b) how much work (in eV) isdone on the electron by the electric field in the strip,and (c) how much energy (in eV) istransferred to the thermal energy of the strip by the electron?
(a)
Number
Units
(b)
Number
Units
(c)
Number
Units
(a)
Number
Units
This answer has no units ° (degrees) m kg s m/s m/s^2 N J W N/m kg·m/s or N·s N/m^2 or Pa kg/m^3 g m/s^3 timesExplanation / Answer
(A) The direction of the motionof electrons is always opposite the direction of the
flow of conventional current.
Thus, the direction of the motion of electrons must be in an upwarddirection.
(c) As from the law ofconservation of energy,
The thermal energy = the work done by the electron.
U = 45 eV