a. Solution: Answer: (a)Suppose length of escalator = LSpeed of man w.r.t escalator L / t1Speed of escalator = L / t2Speed of man w.r.t ground... View Article
(a) 1(b) 2(c) 3(d) 4Solution: (b) 2Beat produced between(v-1) and v is 1.Beat produced between v and v+1 is 1. Beat produced between(v-1) and... View Article
(a) λ/4(b) λ/3(c) λ/2(d) λSolution: (c) λ/2In a sine wave, the particles on the string vibrate in simple harmonic motion. The particles having... View Article
(a) 16:1(b) 1: 4(c) 2:3(d) 4:1Solution: (d) 4:1Speed of sound in a medium = v = √(γP/ρ)For given temp, PH2 = PO2Also, γH2 = γO2ρ = m/VTherefore,... View Article
(a) T(b) 2T(c) T/2(d) T/4Solution: (d) T/4Here T be the total time taken by a particle of wave to complete its one round.From mean to extreme,... View Article
(a) speed(b) wavelength(c) intensity(d) frequencySolution: (d) frequencyWhen sound travels from one medium to another the speed definitely... View Article
(a) 2500 s(b) 75 s(c) 4s(d) 0.25 sSolution: (c) 4sThe boat bounces up, which means, it travels from crest to the consecutive crest along wave... View Article
(a) zero(b) π/4(c) π/2(d) πSolution: (c) π/2In transverse waves the particles of the medium vibrate at right angles to the direction in which the... View Article
(a) unchanged(b) doubled(c) quadrupled(d) halvedSolution: (b) doubledSpeed = frequency × wavelength When a wave passes from one medium to the... View Article