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+//chapter18
+//example18.4
+//page401
+
+L=33d-3 // H
+C=0.1d-6 // F
+R=25 // ohm
+
+fr=1/(2*%pi*(L*C)^0.5)
+Xl=2*%pi*fr*L
+Q=Xl/R
+BW=fr/Q
+
+printf("resonant frequency = %.3f Hz or %.3f kHz \n",fr,fr/1000)
+printf("quality factor = %.3f \n",Q)
+printf("bandwidth = %.3f Hz \n",BW)
+
+// the accurate answer for bandwidth is 120.572 Hz but in book it is given as 120 Hz
+// the accurate answer for quality factor is 22.978 but in book it is given as 23