INDUCTANCE AND CAPACITY. 



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portional to F, according 

 to equation (16). When 

 started the body m will con- 

 tinue to vibrate back and 

 forth and the period r of its 

 vibrations is determined by 

 equation (19). 



0, which is proportional to 

 7] according to equation 

 (17). When started, the 

 body will vibrate about the 

 wire as an axis and the 

 period r of its vibrations 

 is determined by equation 

 (20). 



pushes into the condenser 

 a charge q, which is pro- 

 portional to E, according 

 to equation (18). When 

 started the electric charge 

 will surge back and forth 

 through the coil, constitut- 

 ing what is called an oscil- 

 latory current and the period 

 of one oscillation is deter- 

 mined by equation (21). 



