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AI Gen: Modern Physics - Photoelectric Nuclear question bank (Physics)

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Q1.

Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. If the frequency of incident light is doubled and intensity is halved, the maximum kinetic energy of emitted photoelectrons will:

Topic: Modern Physics - Photoelectric Nuclear | Source: AI Generated (JEE Advanced)

(A)

become exactly double

(B)

become more than double

(C)

become less than double

(D)

remain unchanged

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Q2.

A radioactive nucleus A decays into a stable nucleus B with a half-life of 2 hours. Initially, a sample has only nuclei of A. After 6 hours, the ratio of the number of nuclei of B to the number of nuclei of A is:

Topic: Modern Physics - Photoelectric Nuclear | Source: AI Generated (JEE Advanced)

(A)

7 : 1

(B)

1 : 7

(C)

8 : 1

(D)

1 : 8

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