NEET Physics: Electromagnetic Waves — MCQ Test 20

Q6. What protects the Earth from excessive ultraviolet radiation?

Q7. An electromagnetic wave in vacuum has a magnetic field amplitude of \( B_0 = 3 \times 10^{-8} \, \text{T} \). What is the electric field amplitude? (Given \( c = 3 \times 10^8 \, \text{m/s} \))

Q8. What is the primary source of ultraviolet radiation mentioned in the document?

Q9. The speed of electromagnetic waves in vacuum is given by \( c = \frac{1}{\sqrt{\mu_0 \varepsilon_0}} \). If \( \mu_0 = 4 \pi \times 10^{-7} \, \text{H/m} \) and \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{F/m} \), what is the approximate value of \( c \)?

Q10. What did Maxwell's equations predict about the nature of light?

NEET Physics — Electromagnetic Waves

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What is the general form of the electric field component of a plane electromagnetic wave propagating along the \( z \)-direction as per the document?

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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 Electric, Component, Electromagnetic, Propagating, Direction, and Document.

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. What is the general form of the electric field component of a plane electromagnetic wave propagating along the \( z \)-direction as per the document?

  • A. \( E_x = E_0 \sin(kz - \omega t) \)
  • B. \( E_x = E_0 \cos(kz + \omega t) \)
  • C. \( E_x = E_0 \sin(\omega t - kz) \)
  • D. \( E_x = E_0 \cos(kz - \omega t) \)

Q2. Which of Maxwell's equations shows that there are no magnetic monopoles?

  • A. Gauss's Law for magnetism
  • B. Gauss's Law for electricity
  • C. Faraday's Law
  • D. Ampere-Maxwell Law

Q3. Why are microwaves used in aircraft navigation radar systems?

  • A. They have long wavelengths
  • B. They have short wavelengths for precision
  • C. They are absorbed by air
  • D. They travel slower than light

Q4. An electromagnetic wave has a magnetic field given by \( B_y = 5 \times 10^{-8} \sin(3 \times 10^3 z - 9 \times 10^{11} t) \, \text{T} \). What is the wavelength of the wave?

  • A. \( 1.05 \times 10^{-3} \, \text{m} \)
  • B. \( 1.57 \times 10^{-3} \, \text{m} \)
  • C. \( 2.09 \times 10^{-3} \, \text{m} \)
  • D. \( 4.18 \times 10^{-3} \, \text{m} \)

Q5. What does the Ampere-Maxwell Law include as the source of a magnetic field?

  • A. Conduction current and displacement current
  • B. Only conduction current
  • C. Only displacement current
  • D. Magnetic monopoles

+ 5 more questions in the actual test

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