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Relation between wavelength of photon and electron of same energy is Question :- Relation between wavelength of photon and electron of same energy is (A) (B) (C) (D) Solution :- As de Broglie wavelength associated with an electron is given by …..(1) And for photon …..(2) Using this value in…
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A hunter aims his gun and fires a bullet directly at a monkey on a tree. At the instant the bullet leaves the barrel of the gun, the monkey drops. The bullet Question :- A hunter aims his gun and fires a bullet directly at a monkey on a tree. At the instant the…
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A ray of light falling at an angle of 50 Question :- A ray of light falling at an angle of 50° is refracted through a prism and suffers minimum deviation. The angle of the prism is 60° . Find the angle of minimum deviation and refractive index of the material of the prism….
Find the length of the optical path two media in contact of length d1 and d2 of refractive indices μ1 and μ2 respectively : Question : Find the length of the optical path two media in contact of length d1 and d2 of refractive indices μ1 and μ2 respectively : (a) (b) (c) (d) Solution : Optical path length is the distance travelled by light in vacuum in the same…
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The image of point P when viewed from top of the slabs will be : Question : The image of point P when viewed from top of the slabs will be : (a) 2.0 cm above P (b) 1.5 cm above P (c) 2.0 cm below P (d) 1 cm above P Solution : First method : Using the…
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Two Absolute scales X and Y Question :- Two absolute scales X and Y assigned numerical values 200 and 450 to the triple point of water. What is the relation between TX and TY? (A) 9Tx = 4TY (B) 4Tx = 9TY (C) Tx = 3TY (D) None of these Solution :- We are going to…
A gun weighing 10 kg fires a bullet Question :- A gun weighing 10 kg fires a bullet of 20g with a velocity 250 m/s. With what velocity does the gun recoil? Solution :- Here M = 10 kg, m = 2g = 0.02 kg, v = 250 m/s, V = ? Applying the…
A bomb at rest explodes into three equal fragments Question :- A bomb at rest explodes into three equal fragments. Two fragments fly off at right angles with velocity 12 m/s and 9 m/s. If the explosion process occurs in 0.1 s, find out the average force acting on the third particle, if total mass of the bomb…
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A bomb at rest splits into three identical parts Question :- A bomb at rest splits into three identical parts. If two pieces are moving at right angles to each other with same velocity v m/s, the velocity of third fragment is (A) v/√2 (B) v/2 (C) 2v (D) v√2 Solution :- Before splitting,…
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During an experiment with a meter bridge Question :- During an experiment with a meter bridge, the galvanometer shows a null point when the jockey is pressed at 40.0 cm using a standard resistance of 90Ω. The least count of the scale used in the meter bridge is 1mm. The unknown resistance is – (1)…