http://i.imgur.com/37c2x.png
Each shot of the laser gun most favored by Rosa the Closer, the intrepid vigilante of the lawless 22nd century, is powered by the discharge of a 1.15-F capacitor charged to 79.3 kV. Rosa rightly reckons that she can enhance the effect of each laser pulse by increasing the electric potential energy of the charged capacitor. This she would do by replacing the capacitor's filling, whose dielectric constant is 485, with one possessing a dielectric constant of 943.
Find the electric potential energy of the original capacitor when it is charged.
Calculate the electric potential energy of the upgraded capacitor when it is charged.
Thanks
Each shot of the laser gun most favored by Rosa the Closer, the intrepid vigilante of the lawless 22nd century, is powered by the discharge of a 1.15-F capacitor charged to 79.3 kV. Rosa rightly reckons that she can enhance the effect of each laser pulse by increasing the electric potential energy of the charged capacitor. This she would do by replacing the capacitor's filling, whose dielectric constant is 485, with one possessing a dielectric constant of 943.
Find the electric potential energy of the original capacitor when it is charged.
Calculate the electric potential energy of the upgraded capacitor when it is charged.
Thanks
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E₁ = ½CV² = ½(1.15)(79300)²
changing the dielectric constant changes the capacitance by that factor
E₂ = ½CV² = ½(1.15)(943/485)(79300)²
you can do the calculations.
.
changing the dielectric constant changes the capacitance by that factor
E₂ = ½CV² = ½(1.15)(943/485)(79300)²
you can do the calculations.
.