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AI Gen: Modern Physics - Dual Nature question bank (Physics)

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Q1.

Light of two different wavelengths lambda_1 = 4000 Angstrom and lambda_2 = 6000 Angstrom fall on a metal surface whose work function is 2.0 eV. The ratio of the maximum kinetic energies of the emitted photoelectrons is:

Topic: Modern Physics - Dual Nature | Source: AI Generated (NEET)

(A)

1 : 2

(B)

2 : 1

(C)

3 : 2

(D)

1 : 1

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Q2.

The de-Broglie wavelength of an electron accelerated through a potential difference V is lambda. When the potential difference is increased to 4V, the new de-Broglie wavelength becomes:

Topic: Modern Physics - Dual Nature | Source: AI Generated (NEET)

(A)

2 lambda

(B)

lambda / 2

(C)

4 lambda

(D)

lambda / 4

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