Which phenomenon generates electric current? a black body radiation b ultraviolet catastrophe c emission spectra d photoelectric effect

D Photoelectric effect

Explanation:

When light of a certain frequency which is above the cut off frequency   is incident on a metal, electrons are emitted from its surface. These electrons are called photo electrons. The number of photo electrons released will depend on the intensity of the incident light. This flow or release of electrons develops an emf and is called as the photoelectric current.

Applications of photoelectric current include photo conductive cells, photoemissive cells, solar cells etc.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

answer///terminator or twilight zone;