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.
Pumped storage, a type of hydropower technology, can actually help store the electricity generated by other power sources like solar, wind, and nuclear for later use. The technology stores energy in the form of water in an upper reservoir, pumped from a second reservoir at a lower elevation.