   A sheet of paper and a pencil may be useful.

 Support easyphysics.net by visiting our advertisers' websites. Chapter 11 Quiz1. When two spheres repel each other, what are the charges of these two spheres? (a) both positive (b) different charges (c) alike (d) both negative ( e.g. "a" )   2. How will the force between two spheres change if the distance between two sphere doubles? (a) double (b) one half (c) quatriple (d) one forth (e) same ( e.g. "a" )   3. There are two balls. Ball A has a charge of +1.8 * 10-8 C and Ball B has a charge of +1.5 * 10-8 C and is 0.002 m away from A. a. What is the force acting on A? ( e.g. "0.10 N" )   b.Do they attract or repel each other? ( e.g. "attract" or "repel") 4. Charged spheres A and B are fixed in position, as shown, and have charges of +7.9 * 10-6 C and -2.3 * 10-6 C, respectively. Calculate the net force on sphere C, whose charge is +5.8 * 10-6 C. ( e.g. "1.00 N L" (L = left and R = right))   5. Three identically charged spheres A, B, and C, each with a charge of +3.0 * 10-7 C, are located at the corners of a triangle whose sides are 30 cm long and all the angles are 60 deg. What is the net force acting on sphere A? ( e.g. "1.0*10^-1" ) N upward   6. What is the mass of sphere X whose charge is +1.70 * 10-7 C and the distance between charged bar is 20 cm? The bar has a charge of +2.30 * 10-6 C. ( e.g. "1.00*10^-1" ) kg Press the button to check your answer:

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