| ⇦ | 
| ⇨ |
An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into a dielectric medium with relative permittivity ε = 4.0. Then
Options
(a) wavelength is doubled and frequency is unchanged
(b) wavelength is doubled and frequency becomes half
(c) wavelength is halved and frequency remains unchanged
(d) wavelength and frequency both remain unchanged
Correct Answer:
wavelength is halved and frequency remains unchanged
Explanation:
Given : frequency f = 2 MHz, relative permitivity εᵣ = 4
For formula,
velocity v = c / √εᵣ = c / 2
λ’ = λ / 2
[since frequency remains unchanged ]
Related Questions: - A solid sphere, disc and solid cylinder all of the same mass and made up of same material
- A bus is moving with a speed of 10 ms⁻¹ on a straight road
- A projectile is fired at an angle of 45° with the horizontal
- If vₑ is escape velocity and vₙ is orbital velocity of a satellite
- Ratio of the radii of the nuclei with mass numbers 8 and 27 would be
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A solid sphere, disc and solid cylinder all of the same mass and made up of same material
- A bus is moving with a speed of 10 ms⁻¹ on a straight road
- A projectile is fired at an angle of 45° with the horizontal
- If vₑ is escape velocity and vₙ is orbital velocity of a satellite
- Ratio of the radii of the nuclei with mass numbers 8 and 27 would be
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply