+91-8076753736[email protected]
logo
logo
-->

Mechanical Properties Of Fluids

Question
CBSEENPH11020629
Wired Faculty App

Light of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum speeds of emitted electrons will be

  • 1:2

  • 1:4

  • 1:5

  • 1:1

Solution

A.

1:2

Here, KE1 = 1 - 0.5 = 0.5 eV
KE2 = 2.5 - 0.5 = 2 eV

KE subscript 1 over KE subscript 2 space equals space fraction numerator 0.5 over denominator 2 end fraction space equals space 1 fourth o r fraction numerator v subscript 1 superscript 2 over denominator v subscript 2 superscript 2 end fraction space equals space 1 fourth O r space v subscript 1 over v subscript 2 space equals space square root of 1 fourth end root space equals 1 half

Some More Questions From Mechanical Properties of Fluids Chapter

Can sound travel in vacuum?

Can two persons hear each other on the moon? Explain.

Can electromagnetic wave propagate in vacuum?

Can we listen in vacuum?

Which of the two moves forward during wave motion - particle or disturbance?

What type of wave is sound wave when it travels in air?

What type of wave is sound wave when it travels in solids?

Which of the two - sound or light is longitudinal in nature?

In what form the sound travels in air?

Define frequency.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation