Exams › NEET › Physics

A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of :

1. 1000
2. 10000
3. 10
4. 100

Correct answer: 100

Related NEET Physics questions

• Transverse waves can propagate -
• Equation of a progressive sound wave is y = a sin x 400 t – 0.85         where x in (metre), t (second), then frequency of wave is :
• The equation of a progressive wave is y = 0.02 sin 2  t x 0.01 0.3        , where x and y are in meters and t is in second. The velocity of propagation of the wave is -
• The frequency of a man ’ s voice is 300 Hz and its wavelength is 1 meter. If the wavelength of a child ’ s voice is 1.5 m, then the frequency of the child ’ s voice is:
• In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.17 sec. The frequency of the wave is -
• The equation of a wave is given by y = a sin x 100t 10        , where x and y are in metre and t in second; then velocity of wave is :

⚔️ Practice NEET Physics free + battle 1v1 →