Question

The maximum kinetic energy of electrons emitted in the photoelectric effect is linearly dependent on the ____________ of the incident radiation.

Answer 1

"Frequency"
According to laws of photoelectric effect,
$\frac{1}{2}m{v}^2=hv=h{v}_0$
i.e., the maximum kinetic energy of electrons emitted in the photoelectric effect is linearly dependent on the frequency of incident radiation.