Advertisements
Advertisements
Question
Define stopping potential.
Advertisements
Solution
The minimum negative potential given to the anode of a photo-cell for which the photoelectric current becomes zero is called stopping potential.
APPEARS IN
RELATED QUESTIONS
The threshold wavelength for a metal surface whose photoelectric work function is 3.313 eV is __________.
Photons of wavelength λ are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc of radius R by a perpendicular magnetic field having magnitude B. The work function of the metal is
How will you define threshold frequency?
What is a photocell?
Mention the different types of photocells.
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.
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)
UV light of wavelength 1800 Å is incident on a lithium surface whose threshold wavelength is 4965 Å. Determine the maximum energy of the electron emitted.
