A spring scale is used to measure the weight of travel bags at the airport. A weight of 15n causes its spring to extend by 3cmFormula 1( force =elastic constant k × extension x)Formula 2( weight w =mass m × gravity g), where value of g =x10 m/ s2

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates