Download App

Wave Motion and Waves on a String — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsWave Motion and Waves on a String1 Mark
MCQ
A wave pulse, travelling on a two -piece string, gets partially reflected and partially transmitted at the junction. The reflected wave is inverted in shape as compared to the incident one. If the incident wave has wavelengt $\lambda$ and the transmitted wave $\lambda'.$
  • A
    $\lambda'>\lambda$
  • B
    $\lambda'=\lambda$
  • ✓
    $\lambda'<\lambda$
  • D
    Nothing can be said about the relation of $\lambda$ and $\lambda'.$
✓

Answer

Correct option: C.
$\lambda'<\lambda$

Explanation:

As $\text{v}=\sqrt{\frac{\text{f}}{\mu}}$
A wave pulse travels faster in a thinner string. The wavelength of the transmitted wave is equal to the wavelength of the Incident wave because the frequency remains constant.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Wave Motion and Waves on a String→Wave Motion and Waves on a String — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Water boils in an electric kettle in $20$ minutes after being switched on. Using the same main supply, the length of the heating element should be. . . . . . .to . . . . . .. times of its initial length if the water is to be boiled in $15$ minutes.
→
The power factor of $LCR$ circuit at resonance is
→
The magnetic field at a distance $r$ from a long wire carrying current $i$ is $0.4\, Tesla$. The magnetic field at a distance $2r$ is......$Tesla$
→
At what angle should an unpolarised beam be incident on a crystal of $\mu = \sqrt 3$ , so that reflected beam is polarised ..........$^o$
→
The given figure shows $a$ network of resistances and $a$ battery. Identify the correct statement $(s)$
→
Match the List $I$ with the List $II$ from the combinations shown
$(I)$ Presbiopia $(A)$ Sphero-cylindrical lens
$(II)$ Hypermetropia $(B)$ Convex lens of proper power may be used close to the eye
$(III)$ Astigmatism $(C)$ Concave lens of suitable focal length
$(IV)$ Myopia $(D)$ Bifocal lens of suitable focal length
→
Of the following about capacitive reactance which is correct?
→
A thin oil layer floats on water. A ray of light making an angle of incidence of $40^{\circ}$ shines on oil layer. The angle of refraction of light ray in water is ( $\mu_{\text {oil }}=1.45, \mu_{\text {water }}=1.33$ )
→
The figure represents variation of triode parameter ($\pi$ or $r_p$ or gm) with the plate current. The correct variation of $\mu$and rp are given, respectively by the curves
→
A screen is placed $50\,cm$ from a single slit, which is illuminated with $6000$ \mathring A light. If distance between the first and third minima in the diffraction pattern is $3\,mm,$ the width of the slit is.....$mm$
→