⇦ | ⇨ |
The wave described by y = 0.25 sin (10 2πx – 2πt), where x and y are in meters and t in second is a wave travelling along the:
Options
(a) negative x direction with frequency 1 Hz.
(b) positive x direction with frequency π Hz and wavelength λ = 0.2 m.
(c) positive x direction with frequency 1 Hz and wavelength λ = 0.2 m.
(d) negative x direction with amplitude 0.25 m and wavelength λ = 0.2 m.
Correct Answer:
positive x direction with frequency 1 Hz and wavelength λ = 0.2 m.
Explanation:
y = 0.25 sin (10 2πx – 2πt) Comparing this equation with the standard wave equation
y = a sin (kx – ?t) We get, k = 10π
⇒ 2π / λ = 10π ⇒ λ = 0.2 m.
? = 2π or, 2πv = 2π ⇒ v = 1 Hz.
The sign insider the bracket is negative, hence the wave travels in +ve x-direction.
Related Questions: - Dimensional formula of magnetic field in terms of mass M, length L
- Parsec is the unit of
- Light of wavelength λ is incident on slit of width d. The resulting diffraction
- If force(F),velocity(v) and time(T) are taken as units, then the dimensions of mass are
- A light emitting diode(LED) has a voltage drop of 2 volt across it
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Dimensional formula of magnetic field in terms of mass M, length L
- Parsec is the unit of
- Light of wavelength λ is incident on slit of width d. The resulting diffraction
- If force(F),velocity(v) and time(T) are taken as units, then the dimensions of mass are
- A light emitting diode(LED) has a voltage drop of 2 volt across it
Topics: Waves (80)
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