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                                    Exercices 
                                       
                                    A 
                                      positive charge of 4 × 10-10 
                                      C 
                                      exerts a force on a negative charge of  
                                      7 × 10-10 
                                      C. The distance between the two charges 
                                      is 4 cm. Find the magnitude of the attractive 
                                      force that either charge exerts on the other. 
                                       
                                    Solution: 
                                      Apply Equation (1.1) to find the 
                                      force 
                                    
                                    Click 
                                      here to return to Focus on Math Index 
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