20080 marks22 questions
6 of its 22 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.
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Source: IIT-JEE 2008, Paper 2, Physics, published by JEE (Advanced). The official PDF
A radioactive sample S1 having an activity of 5 μCi has twice the number of nuclei as another sample S2 which has an activity of 10 μCi. The half lives of S1 and S2 can be
A vibrating string of certain length ℓ under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75 cm inside a tube closed at one end. The string also generates 4 beats per second when excited along with a tuning fork of frequency n. Now when the tension of the string is slightly increased the number of beats reduces to 2 per second. Assuming the velocity of sound in air to be 340 m/s, the frequency n of the tuning fork in Hz is
STATEMENT-1 For an observer looking out through the window of a fast moving train, the nearby objects appear to move in the opposite direction to the train, while the distant objects appear to be stationary. and STATEMENT-2 If the observer and the object are moving at velocities V⃗₁ and V⃗₂ respectively with reference to a laboratory frame, the velocity of the object with respect to the observer is V⃗₂ − V⃗₁.
STATEMENT-1 It is easier to pull a heavy object than to push it on a level ground. and STATEMENT-2 The magnitude of frictional force depends on the nature of the two surfaces in contact.
STATEMENT-1 For practical purposes, the earth is used as a reference at zero potential in electrical circuits. and STATEMENT-2 The electrical potential of a sphere of radius R with charge Q uniformly distributed on the surface is given by Q/(4π ε₀R).
STATEMENT-1 The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil. and STATEMENT-2 Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.