Advertisements
Advertisements
प्रश्न
What is a photocell?
Advertisements
उत्तर
Photoelectric cell or photocell is a device which converts light energy into electrical energy. It works on the principle of the photoelectric effect.
APPEARS IN
संबंधित प्रश्न
A light source of wavelength 520 nm emits 1.04 × 1015 photons per second while the second source of 460 nm produces 1.38 × 1015 photons per second. Then the ratio of power of second source to that of first source is
The work functions for metals A, B and C are 1.92 eV, 2.0 eV and 5.0 eV respectively. The metal/metals which will emit photoelectrons for a radiation of wavelength 4100Å is/are
How does photocurrent vary with the intensity of the incident light?
Give the definition of intensity of light according to quantum concept and its unit.
Mention the different types of photocells.
Define stopping potential.
Briefly discuss the observations of Hertz, Hallwachs and Lenard.
Explain the quantum concept of light.
Explain experimentally observed facts of the photoelectric effect with the help of Einstein’s explanation.
Calculate the maximum kinetic energy and maximum velocity of the photoelectrons emitted when the stopping potential is 81 V for the photoelectric emission experiment.
