Answer:
3) more electrons are released
Explanation:
A brighter light of the same frequency has bigger intensity than a dimmer light of the same frequency. With the bigger intensity, it also means that the brighter light has more photons that the dimmer light. The more photons will make the photosensitive surface to release more electrons. Thus, the electric current will be bigger.
Therefore, the answer is 3) more electrons are released.
On the other hand, if 2 lights with same intensity but different frequency shine on the same photosensitive surface. The photon's energy of the higher frequency is bigger than the lower frequency. Therefore, the kinetic energy of the higher frequency will be bigger. However, the electric current will be the same, as the number of electron released will be the same.
