
IIT Guess / IITJEE Papers / 2006 / Physics 468x60 Physics Paper Section – A (Single Option Correct) Q.1. Given The time constants (in μS) for the circuits I, II, III are respectively
Ans. (D)
Sol. (D) Q.2. Two blocks A and B of masses 2m and m, respectively, are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in the figure. The magnitudes of acceleration of A and B, immediately after the string is cut, are respectively
Ans. (B)
Sol . (B) aA = g/2 aB = g Q.3. A point object is placed at a distance of 20 cm from a thin planoconvex lens of focal length 15 cm, if the plane surface is silvered. The image will form at
Ans. (C)
Sol.(C) Q.4. A biconvex lens of focal length f forms a circular image of sun of radius r in focal plane. Then
Ans. (B)
Sol.(B) Q.5. Given a sample of Radium226 having halflife of 4 days. Find the probability, a nucleus disintegrates after 2 half lives.
Ans. (B)
Sol.(B) Disintegration of each nuclei is independent of any factor. Hence, each nuclei has same chance of disintegration. 336x280 
160x600 
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