When the observer moves towards a stationary | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Let the original frequency of the source be $F_{o}$.According to the Doppler effect,when the observer moves towards a stationary source,the appare

Vedclass · Accepted Answer

$3$

Vedclass · Answer

(D) Let the original frequency of the source be $F_{o}$.According to the Doppler effect,when the observer moves towards a stationary source,the apparent frequency $F_{1}$ is given by:$F_{1} = F_{o} \left[ \frac{V + V_{1}}{V} \right]$ ...$(1)$When the observer moves away from the stationary source,the apparent frequency $F_{2}$ is given by:$F_{2} = F_{o} \left[ \frac{V - V_{1}}{V} \right]$ ...$(2)$Dividing equation $(1)$ by equation $(2)$,we get:$\frac{F_{1}}{F_{2}} = \frac{V + V_{1}}{V - V_{1}}$Given that $\frac{F_{1}}{F_{2}} = 2$,we substitute this into the equation:$2 = \frac{V + V_{1}}{V - V_{1}}$$2(V - V_{1}) = V + V_{1}$$2V - 2V_{1} = V + V_{1}$$V = 3V_{1}$Therefore,$\frac{V}{V_{1}} = 3$.

Column-$A$	Column-$B$
$(a)$ When source of sound and listener move towards wall.	$(i)$ Listener would hear a sound with same frequency as that of source.
$(b)$ When source of sound and listener move away from each other.	$(ii)$ Listener would hear a sound with frequency smaller than that of source.
	$(iii)$ Frequency of echo would be greater than that of source.

Similar Questions

$A$ train is moving towards a stationary observer (at $t = 0$) with a constant velocity of $20 \ m/s$ and after some time it crosses the observer. Which of the following curves best represents the frequency $f$ received by the observer as a function of time?

The Doppler effect is applicable for

Vedclass Test Series

Exam Paper Generator

Online Exam Module