# National Standard Examination in Physics (NSEP) Solved Paper 2016 Part-7

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Q: 22. In the adjacent circuit a resistance R is used. Initially with ‘wire AB’ not in the circuit, the galvanometer shows a deflection of d divisions. Now, the ‘wire AB’ is connected parallel to the galvanometer and the galvanometer shows a deflection nearly d/2 divisions. Therefore

(A)

(B)

(C)

(D)

Answer: (C)

Q: 23. At a certain height h above the surface of the earth the change in the value of acceleration due to gravity (g) is the same as that at a depth x below the surface. Assuming h and x to be enough small compared to the radius of the earth, x : h is

(A)

(B)

(C)

(D)

Answer: (B)

Q: 24. Two point masses and are connected at the ends of a light rigid rod of length ℓ. The moment of inertia of the system about an axis through their centre of mass and perpendicular to the rod is

(A)

(B)

(C)

(D)

Answer : (B)

Q: 25. Two particles of masses m and M are initially at rest and infinitely separated. At a later instant when they are at a finite distance d from each other, their relative velocity of approach is

(A)

(B)

(C)

(D)

Answer:(B)

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