Question

The incidents light has intensity $I$ and the number of electrons emitted per second is $N$. Then the maximum kinetic energy of emitted electrons per second is $K$. If the intensity of the incidents light is doubled, then the number of electrons emitted per second and the maximum kinetic energy respectively are

• A. $N , K$
• B. $2N$ and $K$
• C. $N$ and $2K$
• D. $2N$ and $2K$

Answer 1

Answer: (B)

The maximum kinetic energy of emitted electrons is independent of intensity of incident light and the number of electrons emitted directly proportional to the intensity of incident light