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+//chapter 30
+//example 5
+clc
+//given
+epsilon0=8.85*10^-12 //coul2/nt-m2
+A=100*10^-4//area of the plate in square meter
+d=1*10^-2 //separation b/w plates in meter
+b=5*10^-3 //thickness of dielectric lab in meter
+V0=100//in volts
+k=7
+//(a)
+C0=epsilon0*A/d
+disp(C0,"(a)Capacitance before the slab is inserted in farad is")
+//(b)
+q=C0*V0
+disp(q,"(b)Free charge in coul is")
+//(c)
+E0=q/(epsilon0*A)
+disp(E0,"(c)Electric field strength in the gap in volts/meter is")
+//(d)
+E=q/(k*epsilon0*A)
+disp(E,"(d)Electric field strength in the dielectric in volts/meter is")
+//(e)
+//Refer to fig30-12
+V=E0*(d-b)+E*b
+disp(V,"(e)Potential difference between the plates in volts is")
+//(f)
+C=q/V
+disp(C,"Capacitance with the slab in place in farads is")