What is the purpose of capacitors in portable electronic devices that can work even when unplugged? They store charge and therefore electric potential energy false They make the device capable of storing energy by themselves false They prevent the device from losing electric energy too quickly true They enable the device to transform electric potential energy into work false Single This quantity refers to the ability of a capacitor to store energy. The quotient of the charge of the capacitor and their potential difference true The product of the charge of the capacitor and their potential difference false The quotient of the potential difference of the capacitor over its charge false The pemittivity of the capacitor's dielectric times the dielectric constant false Single One unit of the SI unit of capacitance, the farad, is equal to what value? 1 C/V true 1 V/C false 1 C·V false 1 N·C/m false Single What is the value of the permittivity of free space in the context of finding the capacitance of a parallel-plate capacitor? 8.8540 × 10_-12 F/m true 8.8540 × 10_-12 C₂/N·m₂ false 1.6022 × 10_-19 F/C false 9.0 × 10₉ F/V false Single What does it mean when capacitors are connected in parallel? The current flows only through a single path through the capacitors false The capacitors are arranged in such a way that they form parallel lines false The capacitors are connected to the energy source by parallel wires false The current diverges somewhere along its path through the capacitors true Single Which of the following statements best describe the equivalent capacitance of capacitors connected in series? It is equal to the sum of the individual capacitance of its components false It is always equal to the individual capacitance of its components false It is always less than the invididual capacitance of its components true It is always greater than the individual capacitance of its components false Single What does it mean when a capacitor is discharging? It has gained an excess concentration of protons false Its electrical energy is being re-transformed into work true It has been recently disconnected from an energy source false Its charges are disappearing one particle at a time false Single Which of the following statements is true about the relationship between the energy density of a capacitor and its electric field? It is directly proportional to the magnitude of electric field true It is inversely proportional to the magnitude of electric field false It is independent of the magnitude of electric field false Decreasing its electric field decreases its magnitude by a factor of two false Single Which of the following materials are used as dielectric? air true copper false silicon false germanium false Single Fill in the blanks. The dielectric strength of Pyrex glass is _________ distilled water. equal with that of false higher than true lower than false negligible compared to that of false Single