light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions
light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]
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Question : 1
Consider the following statements:
- Speed of wave = $\text"wave length"/\text"time period"$.
- Wavelength is the distance between two nearest particles in phase.
- The flash of lightening is seen before the sound of thunder is heard.
- Speed of sound is greater than speed of light.
a) 1, 2 and 3
b) 1 and 2
c) 2 and 3
d) 1, 2, 3 and 4
Answer »Answer: (a)
Speed of sound at NTP = 332 m/s,
whereas speed of light is 3 × 108
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» Measurement And SI Units
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