Advertisements
Advertisements
Question
What is a photocell?
Advertisements
Solution
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
RELATED QUESTIONS
Two radiations with photon energies 0.9 eV and 3.3 eV respectively are falling on a metallic surface successively. If the work function of the metal is 0.6 eV, then the ratio of maximum speeds of emitted electrons in the two cases will be
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
Define stopping potential.
Briefly discuss the observations of Hertz, Hallwachs and Lenard.
List out the laws of photoelectric effect.
Obtain Einstein’s photoelectric equation with the necessary explanation.
Give the applications photocell.
How many photons of frequency 1014 Hz will make up 19.86 J of energy?
At the given point of time, the earth receives energy from the sun at 4 cal cm–2 min–1. Determine the number of photons received on the surface of the Earth per cm2 per minute. (Given: Mean wavelength of sunlight = 5500 Å)
