National Standard Examination in Astronomy (NSEA) Solved Paper 2016 Part-18

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Q: 62. ∆ ABC is equilateral with each side being of unit length and P is an interior point then the maximum product of the length AP . BP and CP is

(A)

(B)

(C)

(D)

Answer: (C)

Q: 63. The resultant of the forces P and Q is R if Q is doubled then R gets doubled. If Q is reversed even then R gets doubled. Then

(A)

(B)

(C)

(D)

Answer: (A)

Q: 64. The unit digit of is

(A) 1

(B) 3

(C) 7

(D) 9

Answer: (A)

Q: 65. Linked question (65 - 69)

A star can be considered as a spherical ball of hot gas of radius R. Inside the star, the density of the gas is at a radius r and mass of the gas within this region is The correct differential equation for variation of mass with respect to radius is (refer to the adjacent figure)

Q_65_Spherical Ball

(A)

(B)

(C)

(D)

Answer: (B)

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