26. The charge qafter Ncycles is obtained by substituting t = NT= 2πN/ω'into Eq. 31-25: ()( )/22//2/coscos2/cos 2cos .RtLRNTLRNL CLNRCLqQetQeNQeNQeφωφ−−−π′′′⎡⎤=+=π+⎣⎦=π+=We note that the initial charge (setting N= 0 in the above expression) is q0= Qcos , where q0= 6.2 µC is given (with 3 significant figures understood). Consequently, we write the above result as ( )0exp/
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