⇦ | ⇨ |
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: - If the ionisation energy for the hydrogen atom is 13.6 eV, the energy required
- A bar magnet of magnetic moment M is placed at right angles to a magnetic
- A boy whirls a stone in a horizontal circle of radius 1.5 m and at height 2.0 m
- A neutron is moving with a velocity u.It collides head on and elastically with an atom
- A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the ionisation energy for the hydrogen atom is 13.6 eV, the energy required
- A bar magnet of magnetic moment M is placed at right angles to a magnetic
- A boy whirls a stone in a horizontal circle of radius 1.5 m and at height 2.0 m
- A neutron is moving with a velocity u.It collides head on and elastically with an atom
- A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected
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