National Standard Examination in Astronomy (NSEA) Solved Paper 2016 Part-7
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Q: 18. Which of the following statements are true about periodic functions defined on the set of real numbers?
A : Sum of two functions with finite period is always a periodic function with finite period
B: The period of a function that is sum of two periodic functions with finite period is least common multiple of the period of two functions
(A) A and B are correct
(B) A is correct but B is incorrect
(C) A is false but B is correct
(D) A and B are false
Answer: (D)
Q: 19 Unaware about the fact that analog ammeters and voltmeters can also have zero error, a student recorded following readings while determining resistance by using Ohm’s law
Obs. No. | Voltage / V | Current / mA |
1 | 1.0 | 40 |
2 | 3.0 | 80 |
3 | 5.0 | 120 |
4 | 7.0 | 160 |
5 | 9.0 | 200 |
If the ammeter has no zero error, the zero error in the voltmeter is.
(A) -1V
(B) -1.5 V
(C) 0.5 V
(D) 1V
Answer: (A)
Q: 20 The inverse function of the function sin X + cos X is
(A)
(B)
(C)
(D)
Answer: (D)
Q: 21. Particle A collides elastically (Perfect) with particle B which was at rest. They disperse in opposite directions with same speeds. Ratio of their masses must respectively be
(A)
(B)
(C)
(D)
Answer: (B)
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