In the figure below, a battery of potential difference V = 34 V is connected to

Question

In the figure below, a battery of potential differenceV = 34 V is connected to a resistive strip of resistanceR = 8.0 . When an electron moves through the stripfrom one end to the other, (a) in which directionin the figure does the electron move (1 = upward, 2 = downward),(b) how much work (in eV) is done on the electronby the electric field in the strip, and (c) howmuch energy (in eV) is transferred to the thermal energy of thestrip by the electron?

(a)

Number

Units

(b)

Number

Units

(c)

Number

Units

Chapter 26, Problem 40 Incorrect.

In the figure below, a battery of potential differenceV = 34 V is connected to a resistive strip of resistanceR = 8.0 . When an electron moves through the stripfrom one end to the other, (a) in which directionin the figure does the electron move (1 = upward, 2 = downward),(b) how much work (in eV) is done on the electronby the electric field in the strip, and (c) howmuch energy (in eV) is transferred to the thermal energy of thestrip by the electron?

(a)

Number

1

Units

This answer has no units

(b)

Number

Units

eV

(c)

Number

34

Units

eV

Explanation / Answer

   a.   1   (electrons move from- ve to + ve terminal)    b.   Workdone   W   =   q* V                                     =   1.6* 10-19 * 34                                     =   54.4* 10-19   J    1 eV   =   1.6* 10-19   J    =>   W   =   54.4* 10-19 / 1.6 * 10-19                   =   34   eV                   =   34   eV    c.  According to work energytheorem       heat energy given byelectron   =   work done onelectron                                                          =   34   eV

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