JEE Mains · Physics · STD 11 - 14. waves and sound
A progressive wave travelling along the positive \(x-\) direction is represented by \(y(x, t) = A\,sin\,\left( {kx - \omega t + \phi } \right)\). Its snapshot at \(t = 0\) is given in the figure For this wave, the phase \(\phi \) is
- A \(\pi \)
- B \(\frac{\pi }{2}\)
- C \(-\frac{\pi }{2}\)
- D \(0\)
Answer & Solution
Correct Answer
(A) \(\pi \)
Step-by-step Solution
Detailed explanation
\(y=A \sin (k x-w t+\phi)\) at \(x=0, t=0\) and slope is negative \(\Rightarrow \phi=\pi\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The driver sitting inside a parked car is watching vehicles approaching from behind with the help of his side view mirror, which is a convex mirror with radius of curvature \(\mathrm{R}=2 \mathrm{~m}\). Another car approaches him from behind with a uniform speed of \(90 \mathrm{~km} / \mathrm{hr}\). When the car is at a distance of 24 m from him, the magnitude of the acceleration of the image of the car in the side view mirror is ' a '. The value of 100 a is _______ \(\mathrm{m} / \mathrm{s}^2\).JEE Mains 2025 Hard
- A printed page is pressed by a glass of water. The refractive index of the glass and water is \(1.5\) and \(1.33\), respectively. If the thickness of the bottom of glass is \(1\, cm\) and depth of water is \(5\, cm\) , how much the page will appear to be shifted if viewed from the top ?JEE Mains 2013 Medium
- Match List \(I\) with List \(II\).
Choose the correct answer from the options given belowLIST \(-I\) LIST \(-II\) \((A)\) Torque \((I)\) \(kg\,m ^{-1}\,s ^{-2}\) \((B)\) Energy density \((II)\) \(kg\,m\,s^{-1}\) \((C)\) Pressure gradient \((III)\) \(kg\,m ^{-2}\,s ^{-2}\) \((D)\) Impulse \((IV)\) \(kg\,m ^2\,s ^{-2}\) JEE Mains 2023 Medium - A body of mass \(50 \mathrm{~kg}\) is lifted to a height of \(20 \mathrm{~m}\) from the ground in the two different ways as shown in the figures. The ratio of work done against the gravity in both the respective cases will be _______.
JEE Mains 2024 Hard - A parallel plate capacitor has plate of length \('l',\) width \('w'\) and separation of plates is \('d'.\) It is connected to a battery of emf \(V\). A dielectric slab of the same thickness '\(d\)' and of dielectric constant \(k =4\) is being inserted between the plates of the capacitor. At what length of the slab inside plates, will be energy stored in the capacitor be two times the initial energy stored\(?\)JEE Mains 2020 Hard
- A coaxial cable consists of an inner wire of radius \('a'\) surrounded by an outer shell of inner and outer radii ' \({b}\) ' and '\(c\)' respectively. The inner wire carries an electric current is, which is distributed uniformly across cross-sectional area. The outer shell carries an equal current in opposite direction and distributed uniformly. What will be the ratio of the magnetic field at a distance \({x}\) from the axis when \((i)\) \({x}<{a}\) and \((ii)\) \({a}<{x}<{b}\) ?JEE Mains 2021 Hard
More PYQs from JEE Mains
- A long cylindrical conductor with large cross section carries an electric current distributed uniformly over its cross-section. Magnetic field due to this current is :
A. maximum at either ends of the conductor and minimum at the midpoint
B. maximum at the axis of the conductor
C. minimum at the surface of the conductor
D. minimum at the axis of the conductor
E. same at all points in the cross-section of the conductor
Choose the correct answer from the options given below :JEE Mains 2026 Hard - The sum to \(10\) terms of the series \(\frac{1}{1+1^2+1^4}+\frac{2}{1+2^2+2^4}+\frac{3}{1+3^2+3^4}+\ldots\). is:-JEE Mains 2023 Hard
- If \([ t ]\) denotes the greatest integer \(\leq t\), then the value of \(\int_{0}^{1}\left[2 x-\left|3 x^{2}-5 x+2\right|+1\right] d x\) is.JEE Mains 2022 Hard
- The area enclosed by \(y ^{2}=8 x\) and \(y=\sqrt{2} x\) that lies outside the triangle formed by \(y=\sqrt{2} x, x=\) \(1, y=2 \sqrt{2}\), is equal toJEE Mains 2022 Medium
- In a conductor, if the number of conduction electrons per unit volume is \(8.5 \times 10^{28}\, m^{-3}\) and mean free time is \(25\,fs\) (femto second), its approximate resistivity is \(\left( {{m_e} = 9.1 \times {{10}^{ - 31}}\,kg} \right)\)JEE Mains 2019 Medium
- A wire carrying current \(I\) is tied between points \(P\) and \(Q\) and is in the shape of a circular arc of radius \(R\) due to a uniform magnetic field \(B\) (perpendicular to the plane of the paper, shown by \(\times \times \times \)) in the vicinity of the wire. If the wire subtends an angle \(2\theta_0\) at the centre of the circle (of which it forms an arc) then the tension in the wire is
JEE Mains 2015 Medium