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i Safari File Edit View History Bookmarks Window Help loncapa2.physics.sc.edu LON-CAPA Two identical conductin Chegg Study Guided Solutions Course Documents-PHYS212-001-.. roses of tacloban - Google Search David Byrne & Fatboy Slim-The Ro... Main Menu Course Contents| Course Contents » >> Hw 1 » Two identical conducting spheres Notes W Bookmark à Evaluate -Print 'n Info Communicate (8c21p7) Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of-0.8238 N when separated by 50 cm, center-to-center. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.2247 N. What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here. 2.5E-6 C Submit Answer Incorrect. Tries 2/99 Previous Tries Enter the larger value here. Submit Answer Tries 0/99 This discussion is closed Send Feedback 28

Explanation / Answer

Let the charges be q1 and q2,

So initially,

k*q1*q2/0.52=0.8238N

q1q2=2.2883*10-11......(1)

And, when they are left connected for some time through wire, their potentials will become same and so the charge will also be same as their geometry is same.

So,

kq2/0.52=0.2247

q=2.49*10-6

so initailly total charge was=2q

=5*10-6

So,

q1-q2=5*10-6...(2)

Solving (1) and (2)

q1(q1-5*10-6)=2.2883*10-11

q1=7.897*10-6

q2=2.897*10-6

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