Student Login

Home›Chapters›Wave Motion PYQs›Wave Basics & Properties of Sound›Question 10

JEE Main 2026 (24 Jan, Shift 2) · Wave Basics & Properties of Sound

Wave Basics & Properties of Sound question from JEE Main 2026 (24 Jan, Shift 2)

Q10JEE Main 2026 · 24 JAN · SHIFT 2Easy

Wave Basics & Properties of Sound

A point source is kept at the center of a spherically enclosed detector. If the volume of the detector increased by 8 times, the intensity will

Show answer and solution

Answer: (b)

$V = \frac{4}{3}\pi r^3$ , so $V \to 8V$ means $r \to 2r$ .
$I = \frac{P}{4\pi r^2} \propto \frac{1}{r^2}$ , so $I \to \frac{I}{4}$
So the answer is (b) decrease by 4 times.

Report a mistake

More questions on Wave Basics & Properties of Sound

A musical instrument P produces sound waves of frequency 'n' and amplitude 'A'. Another…MHT CET 2026 (13 Apr, Shift 1)
An observer on sea-coast counts 45 waves in one minute. If the wavelength of the waves is…MHT CET 2025 (21 Apr, Shift 1)
A musical instrument ' P ' produce sound waves of frequency ' n ' and amplitude ' A '…MHT CET 2025 (26 Apr, Shift 2)
Which of the following statements is NOT true?MHT CET 2024 (11 May, Shift 2)
Prong of a vibrating tuning fork is in contact with water surface. It produces concentric…MHT CET 2024 (10 May, Shift 2)
Out of the following musical instruments, which is 'NOT' a percussion instrument?MHT CET 2024 (9 May, Shift 1)
How many times more intense is a 60 dB sound than a 30 dB sound?MHT CET 2024 (16 May, Shift 1)
A point source is emitting sound waves of intensity 16 × 10⁻⁸ Wm⁻² at the origin. The…JEE Main 2024 (30 Jan, Shift 2)