In photoelectric effect, photoelectric Einstein's equation is E = hν − φ. I. φ represents work function metal. II. The electrons will not be emitted if hν < φ. III. The increasing intensity of falling photon increases the kinetic energy of emitted electrons. Which are correct?

Which of the following statements is correct? As the temperature increases,

Which of the following photoelectric devices is most suitable for digital applications?

In which one of the following devices, the light energy is converted into the electrical energy?

Solar cell is a device that converts light energy into electrical energy. We obtain the highest output of energy during noon when the sun is just above our head, because

What is the source of electrical energy in an artificial satellite?