ࡱ > 0 2 / bjbj>> 4 T T H H H H H \ \ \ \ h $ \ . g g g $ / ! v H g g g g g H H g H H g V t @ 8 @7r q l 0 x W" v W" 8 W" H 8 4 g g g g g g g g g g g g g g W" g g g g g g g g g : Name:________________________________________ Electric Force and Coulombs Law Problems How are conductors different from insulators? A negatively charged balloon has 3.5C of charge. How many excess electrons are on this balloon? Would you expect the shocks from static electricity to be more severe in summer or winter? Explain. A balloon is negatively charged by rubbing and then clings to the wall. Does this mean the wall is positively charged? Which effect proves to be more conclusively that an object is charged, attraction or repulsion from another object? Explain. What are the similarities and differences between electric force and gravitational force? The hydrogen atom has the simplest structure of all atoms. Its nucleus is a proton outside of which there is a single electron at an average separation distance of 5.3 x 10-11m. Compare the electrical and gravitational forces between the proton and the electron in a hydrogen atom. A negative charge of 2.0 x 10-4C and a positive charge of 8.0 x 10-4C are separated by 0.50m. What is the force between the two charges? A negative charge of 3.5 x 10-7C exerts a repulsive force of 65 N on a second charge 0.40m away. What is the magnitude of the second charge? Two negative charges of 3.0 x 10-6C exert a repulsive force of 2.0N on each other. By what distance are they separated? . / K P Y Z d t w . 0 5 7 M N 7 9 > @ ^ ` ƺƱҺҺҗҗҺҗґҗҺ h':Y CJ h`i CJ H*h hPX CJ h h`i CJ H*h h`i CJ h