The threshold frequency for a metal is \( 7.0 \times 10^{14} \mathrm{~s}^{-1} \). Calculate the ....

Channel:
PW Solutions
Subscribers:
449,000
Published on ● Video Link: https://www.youtube.com/watch?v=ToBKiuRQVV4


Duration: 1:42
2 views
0

The threshold frequency for a metal is \( 7.0 \times 10^{14} \mathrm{~s}^{-1} \).
\( \mathrm{P} \)
Calculate the kinetic energy of an electron emitted
W
when radiation of frequency \( 1.0 \times 10^{15} \mathrm{~s}^{-1} \) hits the metal.
(1) \( 1.98 \times 10^{-18} \mathrm{~J} \)
(2) \( 1.98 \times 10^{-19} \mathrm{~J} \)
(3) \( 2 \times 10^{-16} \mathrm{~J} \)
(4) \( 2 \times 10^{-19} \mathrm{~J} \)


📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2024-01-22Which of the following is the energy of a possible excited state of \( \mathrm{Li}^{2+} \) ?....
2024-01-22What is the frequency of a photon emitted during a transition from \( n=6 \) to \( n=3 \) state ....
2024-01-22A gas absorbs a photon of \( 240 \mathrm{~nm} \) and emits at two wavelengths. If one of the emi....
2024-01-22Which of the following are matched correctly?....
2024-01-22A radio station broadcasts at a frequency of 2965 kilo Hertz. Another radio station broadcasts a....
2024-01-22The mass of electron is \( 9.11 \times 10^{-31} \mathrm{Kg} \). Calculate the uncertainty in its....
2024-01-22In a compound \( \mathrm{C}, \mathrm{H}, \mathrm{N} \) atoms are present in \( 9: 1 \) : 3.5 by ....
2024-01-22Which of the following statement is not correct?....
2024-01-22Calculate the ratio of the radius of \( \mathrm{Be}^{3+} \) ion in second energy level to that o....
2024-01-22Electron will first enter into the orbital with the set of quantum number....
2024-01-22The threshold frequency for a metal is \( 7.0 \times 10^{14} \mathrm{~s}^{-1} \). Calculate the ....
2024-01-22How many electrons in sulphur \( (Z=16) \) can have \( \mathrm{n}+l=4 \) ?....
2024-01-22How far from the nucleus is the electron in a hydrogen atom if it has energy of \( -0.850 \mathr....
2024-01-22Law of multiple proportions is not applicable for the oxide(s) of....
2024-01-22\( 6.02 \times 10^{20} \) molecules of glucose are present in \( 0.1 \mathrm{~L} \) of solution ....
2024-01-22Which of the following has same value of angular momentum?....
2024-01-22Calculate the de Broglie wavelength of an electron that has been accelerated from rest through a....
2024-01-22Equal masses of \( \mathrm{O}_{2}, \mathrm{H}_{2} \) and \( \mathrm{CH}_{4} \) are taken in iden....
2024-01-22Temperature at which the Fahrenheit thermometer give a reading that is twice on the Celsius ther....
2024-01-22A transmitting antenna at the top of a tower has a height \( 32 \mathrm{~m} \) and the height of....
2024-01-22The size of the antenna is \( 75 \mathrm{~m} \), the maximum wavelength that could be transmitte....