Question

6. Recall that the electric field of a point-charge obeys an inverse-square law, is directed away from positive charges, and is directed towards negative point charges. In the following diagrams the spacing is uniform between each of the markers. Reproduce these drawings in your notebook whenever necessary. (a) The electric field of a point charge is given below at one point in space. Can you determine whether the charge is positive or negative? Explain why or why not. 900 N/C (b) In the figure below, the electric field of a point charge is shown at two position in space. Now, can you determine whether the charge is positive or negative? Explain why or why not. 900 N/C 400 N/C (c) Can you determine the exact location of the charge? If so, draw it on the figure from the previous part explaining your reasoning. If not, explain why not.

          6. Recall that the electric field of a point-charge obeys an inverse-square law, is directed away from positive charges, and is directed towards negative point charges. In the following diagrams the spacing is uniform between each of the markers. Reproduce these drawings in your notebook whenever necessary.

(a) The electric field of a point charge is given below at one point in space. Can you determine whether the charge is positive or negative? Explain why or why not.
900 N/C

(b) In the figure below, the electric field of a point charge is shown at two position in space. Now, can you determine whether the charge is positive or negative? Explain why or why not.
900 N/C 400 N/C

(c) Can you determine the exact location of the charge? If so, draw it on the figure from the previous part explaining your reasoning. If not, explain why not.

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6. Recall that the electric field of a point-charge obeys an inverse-square law, is directed away from positive charges, and is directed towards negative point charges. In the following diagrams the spacing is uniform between each of the markers. Reproduce these drawings in your notebook whenever necessary.

(a) The electric field of a point charge is given below at one point in space. Can you determine whether the charge is positive or negative? Explain why or why not.
900 N/C

(b) In the figure below, the electric field of a point charge is shown at two position in space. Now, can you determine whether the charge is positive or negative? Explain why or why not.
900 N/C 400 N/C

(c) Can you determine the exact location of the charge? If so, draw it on the figure from the previous part explaining your reasoning. If not, explain why not.

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University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Sri K

06/06/2023

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We know that the electric field obeys the inverse-square law, which means the electric field strength is proportional to 1/r^2, where r is the distance from the point charge. Show more…

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6. Recall that the electric field of a point-charge obeys an inverse-square law, is directed away from positive charges, and is directed towards negative point charges. In the following diagrams the spacing is uniform between each of the markers. Reproduce these drawings in your notebook whenever necessary. (a) The electric field of a point charge is given below at one point in space. Can you determine whether the charge is positive or negative? Explain why or why not. 900 N/C (b) In the figure below, the electric field of a point charge is shown at two position in space. Now, can you determine whether the charge is positive or negative? Explain why or why not. 900 N/C 400 N/C (c) Can you determine the exact location of the charge? If so, draw it on the figure from the previous part explaining your reasoning. If not, explain why not.

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Transcript

00:01 Let us solve this question.

00:02 Here there are several positions given and electric field is given here as 900 n per coulomb.

00:14 So, let us assume that there is a positive charge plus q to the left of 900 n per coulomb and minus q to the right of 900 n per coulomb and we can see that both the charges are capable of equally producing the electric field.

00:32 Hence, here it cannot be determined, cannot be determined whether the charge is positive or negative, cannot be determined.

00:45 In the first case, we cannot determine the nature of charge.

00:49 Now, coming to the next part of the question, again several positions are given and here the electric field is 900 n per coulomb and the position is marked as position 1 and here the electric field is 400 n per coulomb and the position is marked as position 2.

01:10 As we can see that electric field at 2 position at 1 and 2, the direction of electric field is same but the magnitude are different.

01:19 So, if we assume that there is negative q charge present over here, then the magnitude of 2 should have been more, but this is not the case.

01:28 So, we can say that minus q is not present here.

01:31 We can confirm this.

01:32 Now, let us assume that there is positive charge to the left of position 1.

01:40 So, the electric field at position 1 should be more and at position 2, this should be less and we can see here that 900 n per coulomb is more than 400 n per coulomb.

01:54 So, we can say that positive charge q is present over here.

01:58 So, in this case, we have determined the nature of charge...

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