NEET Physics: Dual Nature of Matter — MCQ Test 5

Q6. A photon has a momentum of \( 1.8 \times 10^{-27} \, \text{kg m/s} \). What is its wavelength? (Take \( h = 6.63 \times 10^{-34} \, \text{J s} \))

Q7. What characteristic of light quanta (photons) is directly proportional to their frequency?

Q8. A light source emits photons of energy \( 4.5 \times 10^{-19} \, \text{J} \) at a rate of \( 2.0 \times 10^{16} \) photons per second. What is the wavelength of the light? (Take \( h = 6.63 \times 10^{-34} \, \text{J s} \), \( c = 3 \times 10^8 \, \text{m/s} \))

Q9. A photon of wavelength \( 300 \, \text{nm} \) is incident on a metal. What is its energy in eV? (Take \( h c = 1240 \, \text{eV nm} \))

Q10. The threshold frequency of a metal is \( 3.0 \times 10^{14} \, \text{Hz} \). What is the maximum kinetic energy of electrons emitted by light of wavelength \( 500 \, \text{nm} \)? (Take \( h = 6.63 \times 10^{-34} \, \text{J s} \), \( c = 3 \times 10^8 \, \text{m/s} \))

NEET Physics — Dual Nature of Matter

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Light of wavelength 400 nm400 \, \text{nm} is incident on a metal with a stopping potential of 1.2 V1.2 \, \text{V}. What is the threshold wavelength? (Take hc=1240 eV nmh c = 1240 \, \text{eV nm})

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Dual Nature of Matter. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

0
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10
Medium
0
Hard

Key concepts covered in this specific test include Wavelength, Incident, Stopping, Potential, Threshold, and Relationship.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1.

Light of wavelength 400 nm400 \, \text{nm} is incident on a metal with a stopping potential of 1.2 V1.2 \, \text{V}. What is the threshold wavelength? (Take hc=1240 eV nmh c = 1240 \, \text{eV nm})

  • A.

    600 nm

  • B.

    620 nm

  • C.

    653 nm

  • D.

    700 nm

Q2.

What is the nature of the relationship between the stopping potential and the frequency of incident light in the photoelectric effect?

  • A.

    Inverse

  • B.

    Exponential

  • C.

    Quadratic

  • D.

    Linear

Q3.

Which property of incident light determines the maximum kinetic energy of photoelectrons, assuming the metal remains the same?

  • A.

    Frequency

  • B.

    Intensity

  • C.

    Wavelength

  • D.

    Polarization

Q4.

Light of frequency 6.2×1014 Hz6.2 \times 10^{14} \, \text{Hz} is incident on a metal with work function 2.1 eV 2.1 \, \text{eV}. What is the stopping potential? (Take h=6.63×10−34 J sh = 6.63 \times 10^{-34} \, \text{J s}, e=1.6×10−19 Ce = 1.6 \times 10^{-19} \, \text{C})

  • A.

    0.4 V

  • B.

    0.45 V

  • C.

    0.5 V

  • D.

    0.47 V

Q5.

Which of the following particles was historically identified as a universal constituent of matter through cathode ray experiments?

  • A.

    Electron

  • B.

    Proton

  • C.

    Neutron

  • D.

    Photon

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