•  Capacitance of plate capacitor C$=3\mathrm{.}5$ nF and the gap between the plates d$=1\mathrm{.}3$ mm$.$ The capacitor is attached to a voltage source whose voltage is V$0=29$ V$.$ 

 

•  a$)$ How big is the electric field inside the capacitor? 

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•  b$)$ How big is the charge in the capacitor? 

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 When the capacitor is still connected to a constant voltage source, the capacitor is filled with insulation with an insulation constant of $2\mathrm{.}8.$  

•  c$)$ How big is the electric field inside the capacitor now? 

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•  d$)$ How big is the charge in the capacitor now? 

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•   If the capacitor is disconnected from the constant voltage source before the insulator $($insulation constant $2\mathrm{.}8)$ addition, so how does the situation change compared to the previous points. 

•  e$)$ How big is the electric field inside the capacitor then? 

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•   f$)$ How big is the charge in the capacitor then? 

 

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