Given the following electric potential function, identify the the location or lo
ID: 2076804 • Letter: G
Question
Given the following electric potential function, identify the the location or locations (could be multiply places) for: a. Where the electric field is largest:____ b. Where the electric field is zero:____ c. Which way does the electric field point? i. From A rightarrow C or C rightarrow A: ____ ii: From C rightarrow D or D rightarrow C: ___- d. Where will a positive point charge have the greatest potential energy? ____ e. A negative point charge at B will try to move toward A, C or remain in equilibrium? If a sine wave is sent through a PN junction diode, as shown, what will the output look like? Draw a representative diagram below the picture to represent your answer.Explanation / Answer
5] a] Electric field is the negative gradient of Potential. So the point on the graph with the maximum slope will correspond to the point with maximum Electric field.
This point happens to be B.
b] Electric field is zero where the gradient is zero. This happens at A and C.
c] Since the Electric field is the negative gradient of Potential, a negative slope corresponds to Electric field pointing in positive direction and vice versa.
Thus, from A to C, the slope is negative and therefore, the electric field is pointing in the positive x direction.
From C to D, the slope is positive and so the electric field is pointing in the negative x direction.
d] U = qV
so, the potential energy will be maximum when Potential V is maximum. Hence point A will have the greatest potential energy.
e] A negative charge at B will travel in the opposite direction to the direction of electric field. Hence the charge will move to A.
6] The diode will be acting as an open circuit for the negative half cycle of the signal hence the output will be a half wave with only the positive cycle.
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