A paper filled capacitor is charged to a potential difference of 2.1 V and then disconnected from the charging circuit. The diel
ectric constant of the paper is 3.7. Keeping the plates insulated, the paper filling is withdrawn, allowing air to fill the capacitor instead. Find the resulting potential difference off the capacitor. (volts)
While continuing to keep the capacitor's plates insulated, an unknown substance is inserted between them. The plates then attain a potential difference that is 0.59 times the original potential difference (when paper filled the capacitor). What is the substances dielectric constant?
We should not carry an umbrella during an thunderstorm. During thunderstorms, which are accompanied by lightning, electric discharge from the clouds can travle through the cloud metallic rod of the umbrella. This may give an electric shock to the person whos carrying it.