It is legal to look for work while visiting Canada. Obviously, you should always tell the truth to the officer and state your purposes in the country. You would also need to prove to the immigration officer that the plan is to leave Canada within the maximum allowed time and that you will not work in the country without the proper work permit.
Dielectric materials for semiconductor chips. Dielectric material characterize with very low electrical conductivity (one millionth of a mho / cm), in which an electric field can be sustained with a minimal leakage. It can store electrical energy/charge.
Capacitors store energy. If a voltage is applied to a capacitor and then disconnected, the charge that is stored in the capacitor remains until the capacitor is discharged in some way. An electric field then exists between the plates, which allows the capacitor to store energy.