A point charge of 8 times 10^-9 C (= 8 nC) is located 2.0 meters from a point ch

Question

A point charge of 8 times 10^-9 C (= 8 nC) is located 2.0 meters from a point charge of 5 nC. (a) Find the magnitude of the Coulomb force of one charge on the other. (b) Is the force attractive or repulsive? Find the magnitude of the Coulomb force between a Na^+ ion and a Cl^- ion separated by 0.5 times 10^-9 meter (approximate separation between these ions in a sodium chloride c Would the magnitude of the force change if the sodium ion were replaced by Li^+ and t chloride ion by Br^- ? (Na^+ means the Na atom with 1 electron missing and Cl^- means the the atom with 1 extra electron.) What is the magnitude of the electric field due to a point charge of 5 mu C at a point that is 3 meters away from it? Three charged particles are located at the corners of an equilateral triangle as shown in the figure. Calculate (a) the electric field vector at the location of the 7.00 mu C charge, and (b) the total Coulomb force vector on the 7.00 mu C charge. In the figure below, find the point along the line joining the charges where the electric zero.

Explanation / Answer

will answer 4 parts as per Chegg's policy:

Q.1 F = 9 x 10^9 (8 x 10^-9) (5 x 10^-9) / (4)= 90 x 10^-9 N

b) repulsive in nature

Q. 2 Between Na and Cl

F = 9 x 10^ 9 ( + 1.6 x 10^-9) ( -1.6 x 10^-9) / (0.5 x 10^-9 )^2 = 92.16 x 10^ 9 N

b) No force will remain same between

Q.3 E = 9 x 10^9 (5 x 10^-6) / (9) = 5 x 10^3 N/C

Q. 5 electric field will be 0 to the left of positive charge

K (3 x 10^-6 )/ x^2 = K (5 x 10^-6 ) / ( 1+x) ^2

3 ( x^2 + 1 + 2x) = 5x^2

2x^2 -6x - 3=0

x= 6 + - sqroot ( 36 + 24) / 4

x= ( 6+- 7.746) / 4= 3.43 m

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