Posted by CombatVetUSMC on Saturday, July 14, 2012 at 1:03am.
A positive charge +q1 is located to the left of a negative charge -q2. On a line passing though the two charges, there are two places where the total potential is zero. The first place is between the charges and is 4.03 cm to the left of the negative charge. The second place is 7.01 cm to the right of the negative charge. (a) What is the distance between the charges? (b) Find q1/q2, the ratio of the magnitudes of the charges.
Physics - Elena, Saturday, July 14, 2012 at 7:01am
x1=4.03 cm, x2=7.01 cm.
The left point is A, the right point is B.
Potential due to the point charge is
φ = k•q/r.
Then, at the point A
φ(A2) = -k•q2/x1,
φ(A1)+ φ(A2)=0 =>
At the point B
φ(B2) = -k•q2/x2,
φ(B1)+ φ(B2)=0 =>
Equate the right sides of the equations (1) and(2)
(d-x1)/x1 = (d+x2)/x2
=24.03•7.01/(7.01-4.03) =18.96 cm.
q1/q2 =(d-x1)/x1 =
=(18.96-4.03)/4.03 = 3.7
Answer This Question
More Related Questions
- Physics - A positive charge +q is located to the left of a negative charge -q. ...
- physics - Two charges are fixed in place with a separation d. One charge is ...
- Physics - Review Conceptual Example 7 as background for this problem. Two ...
- physics, help! urgent! - A positive point charge q = +2.50 nC is located at x = ...
- physics - Two charges, -37 µC and +3 µC, are fixed in place and ...
- Physics - Charges of −q and +2q are fixed in place, with a distance of 4....
- physics - Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 ...
- physics 2 - Two charges, -17 and +3.6 µC, are fixed in place and separated by 3....
- Physics - Charge 1 is 3 C , charge 2 is 15 C , the distance between the charges ...
- physics - A positive charge of 1.100ƒÊ C is located in a uniform field of 1.10~...