| ⇦ | 
| ⇨ |
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: - An aeroplane flies 400m due to North and then 300m due to south and then flies
- A dust packet is dropped from 5th storey of a multi-storeyed building
- A parallel plate air capacitor has capacity C, distance of seperation between plate
- A body of mass M hits normally a rigid wall with velocity V and bounces back
- The distance of a geo-stationary satellite from the centre of the earth is nearest to
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An aeroplane flies 400m due to North and then 300m due to south and then flies
- A dust packet is dropped from 5th storey of a multi-storeyed building
- A parallel plate air capacitor has capacity C, distance of seperation between plate
- A body of mass M hits normally a rigid wall with velocity V and bounces back
- The distance of a geo-stationary satellite from the centre of the earth is nearest to
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