NEET Physics: Electromagnetic Waves — MCQ Test 5

Q6. An electromagnetic wave has a wave number \( k = 0.5 \, \text{rad/m} \). What is its wavelength in vacuum?

Q7. Which electromagnetic waves are produced by the vibration of atoms and molecules?

Q8. What significant prediction emerged from Maxwell's equations regarding wave propagation?

Q9. What is the significance of Maxwell's displacement current in the context of electromagnetic waves?

Q10. What property of infrared waves makes them suitable for physical therapy applications?

NEET Physics — Electromagnetic Waves

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An electromagnetic wave in vacuum has a frequency of \( 30 \, \text{MHz} \). What is its wavelength? (Given \( c = 3 \times 10^8 \, \text{m/s} \))

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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 Electromagnetic Waves. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Electromagnetic, Frequency, Wavelength, Relationship, Electric, and Magnetic.

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. An electromagnetic wave in vacuum has a frequency of \( 30 \, \text{MHz} \). What is its wavelength? (Given \( c = 3 \times 10^8 \, \text{m/s} \))

  • A. 5 m
  • B. 10 m
  • C. 15 m
  • D. 20 m

Q2. In electromagnetic wave theory, what is the relationship between the electric and magnetic field amplitudes in vacuum?

  • A. \( E_0 = B_0 \)
  • B. \( E_0 = B_0 c \)
  • C. \( B_0 = E_0 c^2 \)
  • D. \( E_0 = B_0 / c^2 \)

Q3. Infrared waves are often called heat waves because:

  • A. They have the highest frequency
  • B. They cause vibration of atoms and molecules, increasing temperature
  • C. They are produced by cold bodies
  • D. They are not absorbed by any material

Q4. The velocity of light in a medium with permittivity \( \varepsilon \) and permeability \( \mu \) is:

  • A. \( \frac{1}{\sqrt{\mu_0 \varepsilon_0}} \)
  • B. \( \frac{1}{\sqrt{\mu \varepsilon}} \)
  • C. \( \sqrt{\mu \varepsilon} \)
  • D. \( \sqrt{\mu_0 \varepsilon_0} \)

Q5. What is one precaution welders take to protect their eyes from UV radiation?

  • A. Wear ordinary sunglasses
  • B. Use visible light filters
  • C. Avoid using any protection
  • D. Wear special glass goggles

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