1.
The maximum kinetic energy of the photoelectrons varies-

2.
The following graph shows the variation of photocurrent for a photosensitive metal. Choose the correct statement.

3.
Which of the following figures represent the variation of particle momentum and the associated de-Broglie wavelength?

4.
In photoelectric effect, the photocurrent-

5.
If light of wavelength 412.5 nm is incident on each of the metals given below, which ones will show photoelectric emission?

**Metal** | **Work Function (eV)** |

Na | 1.92 |

K | 2.15 |

Ca | 3.20 |

Mo | 4.17 |

6.
What is the de-Broglie wavelength associated with an electron accelerated through a potential difference of 900 V?

8.
The graph of kinetic energy of emitted electron with frequency of incident radiation is plotted as shown in figure. The slope of the graph is-

9.
If the de-Broglie wavelengths for a proton and an alpha particle are equal, then the ratio of their velocities will be-

10.
The ratio of the energy of a photon with λ = 150 nm to that with λ = 300 nm is-