In a sound wave moving in air, air particles mainly move A Up and down B In circles C Stay
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Chapter 6: Sound and Waves (Set-1)
Which statement best explains how sound is produced A By light reflection B By electric charge C By melting solids
Continue readingChapter 5: Light and Optics in Daily Life (Set-5)
A ray strikes a plane mirror at 25°; the angle between incident and reflected rays is A 50 degrees B
Continue readingChapter 5: Light and Optics in Daily Life (Set-4)
A plane mirror is rotated by 10°; the reflected ray turns by A 20 degrees B 10 degrees C 5
Continue readingChapter 5: Light and Optics in Daily Life (Set-3)
A ray makes 50° with the mirror surface; angle of incidence is A 40 degrees B 50 degrees C 90
Continue readingChapter 5: Light and Optics in Daily Life (Set-2)
A ray hits a mirror at 30° to the normal; reflected angle is A 60 degrees B 30 degrees C
Continue readingChapter 5: Light and Optics in Daily Life (Set-1)
Which statement matches the first law of reflection A Light bends in glass B Speed increases in water C Angle
Continue readingChapter 4: Heat and Thermodynamics Basics (Set-5)
Two blocks A and B (same mass) get equal heat. A’s temperature rises 10°C, B’s rises 20°C. Compared to A,
Continue readingChapter 4: Heat and Thermodynamics Basics (Set-4)
Two equal metal blocks get equal heat; the one with higher specific heat will show A Higher temperature rise B
Continue readingChapter 4: Heat and Thermodynamics Basics (Set-3)
A cold metal chair feels colder than a wooden chair in the same room mainly because metal A Has higher
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