Photoelectric Cell and Its Applications

Select the incorrect statement:

In a photoelectric effect, the energy of the photon striking a metallic surface is $5.6\times {10}^{-19}\mathrm{J}.$  The kinetic energy of the ejected electrons is$12.0\times {10}^{-20}\mathrm{J}.$  The work function is:

The photoelectric effect is applied in some burglar alarms. A beam of light shines on a metal electrode in a vacuum tube(photoelectric cell) and causes electrons to be photoelectrically ejected from the surface of the metal. This electrode thus becomes the cathode. The ejected electrons are attracted towards the anode in the vacuum tube and the electrical circuit is completed by means of a battery. If the light beam is blocked by a burglar's arm, the electrical circuit is broken. This sets off the alarm system. What is the maximum wavelength of light that you could use for a burglar alarm if the cathode of the photoelectric cell is made of tungsten and electrons are ejected from tungsten with a kinetic energy of $8.0\times {10}^{-12}$ erg when the wavelength of the incident light is exactly$1.25\times {10}^3\mathrm{A}˚$?

Why do caesium (Cs) and potassium (K) find applications in photoelectric cells?

The function of photoelectric cell is 

List the applications of photoelectric effect.

Explain the working of photo emissive cell. Write any two applications of photoelectric cells.

Write any five applications of photoelectric cells.

Which of the following is/are correct graph for photoelectric effect?

Describe the construction of a photoelectric cell.

The photoelectric cell is a device which converts light energy into electrical energy. The photo electric cells are of three types:

Photo emissive cell is a type of photoelectric cell.

What are photoelectric cells and its types?

_____ is used in photoelectric cells used to convert sunlight into electricity ?

There are, essentially, three types of photoelectric cell; the photoemissive cell, the photovoltaic cell, and the photo conductive cell.This statement is true or false.

What is photoelectric cell and its uses ?

A photo cell is a device which

Photocell works on the principle of

A photoelectric cell converts

How does a burglar alarm work?