EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Dual Nature of Matter and Radiation>JEE Main - 31 January 2023 Shift 2>Q 105

EASY

JEE Main

IMPORTANT

Earn 100

If the two metals $A$ and $B$ are exposed to radiation of wavelength $350 nm$ . The work functions of metals $A$ and $B$ are $4.8 eV and 2.2 eV$ . Then choose the correct option

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Important Questions on Dual Nature of Matter and Radiation

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Dual Nature of Matter and Radiation>JEE Main - 1 February 2023 Shift 1>Q 106

A proton moving with one tenth of velocity of light has a certain de Broglie wavelength of

λ

. An alpha particle having certain kinetic energy has the same de-Brogle wavelength

λ

. The ratio of kinetic energy of proton and that of alpha particle is :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Dual Nature of Matter and Radiation>JEE Main - 1 February 2023 Shift 2>Q 107

The threshold frequency of metal is

f_{0}

. When the light of frequency

2 f_{0}

is incident on the metal plate, the maximum velocity of photoelectron is

v_{1}

. When the frequency of incident radiation is increased to

5 f_{0}

. the maximum velocity of photoelectrons emitted is

v_{2}

. The ratio of

v_{1}

to

v_{2}

is: