Which instrument is used to detect and measure very small electric currents?

Which type of mirror is used in reflecting telescopes?

Which law describes the relationship between the lengths of the sides of a right-angled triangle?

Which type of radiation has the highest penetrating power?

Which phenomenon explains the formation of mirages in deserts?

What is the SI unit of energy?

Which colour of visible light has the longest wavelength?

Which law of thermodynamics states that heat naturally flows from a hotter body to a cooler body?

Which device converts mechanical energy into electrical energy?

Which type of nuclear reaction splits a heavy nucleus into smaller nuclei releasing large amounts of energy?

Which particle carries a positive electric charge in an atom?