The photoelectric effect was explained by:

Which of the following is a semiconductor material?

The photoelectric effect demonstrates that light behaves as a:

A fuse in an electrical circuit is used to:

Einstein's theory of relativity introduced the concept of:

The commercial unit of electrical energy is the:

According to Einstein's mass-energy equivalence, E equals:

Static electricity is generated by:

The quantum of light energy is called a:

Which particle carries a negative electric charge?

Planck's constant relates the energy of a photon to its: