# National Standard Examination in Physics (NSEP) Solved Paper 2016 Part-14

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Q: 48. A rectangular metal tank filled with a certain liquid is as shown in the figure. The observer, whose eye is in level with the top of the tank can just see the coener E of the tank. Therefore, The refractive index of the liquid is

(A) 1.67

(B) 1.50

(C) 1.33

(D) 1.25

Answer: (D)

Q: 49. As shown in the figure, a block of mass m is suspended from a support with the help of system of identical springs. The force constant of each spring is k. Therefore, the frequency of oscillations of the block is.

(A)

(B)

(C)

(D)

Answer:(D)

Q: 50. The impedance (Z) of three electrical components and has frequency (f) dependence as shown by the following three curves.

The three components are respectively

(A)

(B)

(C)

(D)

Answer:(D)

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