Doppler effect for sound depends on: MCQ with Answer and Explanation

Doppler effect for sound depends on:

A. Relative motion between source and observer

B. Observer motion only

C. Source motion only

D. Medium motion only

Answer: Option A

Solution (By JKExamLibrary)

Apparent frequency change depends on relative velocity between source and observer with respect to medium. Both motions contribute: f' = f(v±v_o)/(v∓v_s). Memory tip: 'Approaching ⇒ higher pitch; receding ⇒ lower pitch'. Conceptual question testing Doppler effect fundamentals, frequently examined in competitive exams.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

According to Wien's Displacement Law, if the absolute temperature of a radiating black body is doubled, the wavelength corresponding to maximum spectral emissive power will:

A. Halve

B. Increase four times

C. Remain unchanged

D. Double

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Correct Answer: Option A

Explanation:
Wien's Displacement Law states that the wavelength at which a black body emits maximum radiation (lambda_m) is inversely proportional to its absolute temperature (T). lambda_m * T = b (Wien's constant). If the temperature T is doubled (2T), the peak wavelength lambda_m must strictly halve to maintain the constant product.

This question belongs to: Science Physics

Question #2 Report Error

Myopia (nearsightedness) is corrected by using

A. Cylindrical lens

B. Convex lens

C. Concave lens

D. Bifocal lens

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Correct Answer: Option C

Explanation:
Myopic eye focuses image in front of retina. A diverging (concave) lens spreads light so image falls on retina. Hypermetropia (farsightedness) corrected by convex lens. Bifocals for presbyopia. Cylindrical for astigmatism.

This question belongs to: Science Physics