The figure at the right shows a charge, Q, near a dipole that contains unbalance
ID: 1773612 • Letter: T
Question
The figure at the right shows a charge, Q, near a dipole that contains unbalanced charges +e and e. The dipole is held together by a chemical bond. Answer the following questions giving all correct answers. (Note: you will lose credit for including wrong answers). For reference, we will express magnitudes of forces as multiples of F0 = kcQe/d2 and for directions we will use the labels on the compass rose below the figure. (J and K point perpendicular to the page; J out, K in.) Assume Q is positive. Give all correct answers.
1. What is the direction of the electric force that charge Q feels from the dipole?
---Select--- A B C D E F G H J K
2. What is the magnitude of the electric force that the charge Q feels from the +e charge in the dipole?
---Select---
F0
2F0
F0/2
F0/2
2*F0
22*F0
something else
3. What is the magnitude of the electric force that the charge Q feels from the combined charges in the dipole?
---Select--- F0; 2F0; F0/2; F0/2; 2*F0; 2(2*F0); something else
4. Using the compass rose to specify directions, what is the direction of the electric force that the dipole feels from charge Q?
---Select--- A B C D E F G H J K
5. If charge Q were negative, how would the electric field it feels change?
a. The direction would reverse
b.The direction would stay the same.
c. The magnitude would increase.
d.The magnitude would decrease.
5.The magnitude would stay the same
The figure at the right shows a charge, Q, near a dipole that contains unbalanced charges +e and e. The dipole is held together by a chemical bond. Answer the following questions giving all correct answers. (Note: you will lose credit for including wrong answers). For reference, we will express magnitudes of forces as multiples of F0 = kcQe/d2 and for directions we will use the labels on the compass rose below the figure. (J and K point perpendicular to the page; J out, K in.) Assume Q is positive. Give all correct answers.
1. What is the direction of the electric force that charge Q feels from the dipole?
---Select--- A B C D E F G H J K
2. What is the magnitude of the electric force that the charge Q feels from the +e charge in the dipole?
---Select---
F0
2F0
F0/2
F0/2
2*F0
22*F0
something else
+e d/2 d/2 -e d/2
Explanation / Answer
Given
charge Q , dipole of +e.-e charges and length is d and the dipole moment is from -ve charge to + ve charge
and the force between the charges is
F = kq1q2/r^2
and given F0 = k*Q*q/d^2
1. the direction of the electric force that charge Q from th dipole is
Ans --- C
2.the magnitude of the electric force that the charge Q feels from the +e charge in the dipole is
F = kQ*e/r^2
F = k*Q*e/(sqrt(d/2^2+d/2^2)^2)
F = 2*kQ*e/d^2 = 2*F0 <<---Answer
3.from combined charges , force on Q is 2*2*kQ*e/d^2 = 4*F0
answer is someting else
4.the direction of the electric force that the dipole feels from charge Q is C
5.
If charge Q were negative, how would the electric field it feels change
.The magnitude would stay the same
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