National Standard Examination in Astronomy (NSEA) Solved Paper 2016 Part-9

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Q: 26.

(A) Is defined but cannot be found

(B) Is not defined

(C) Is defined and equals

(D) Is defined and equals

Answer: (D)

Q: 27. An electric buggy is stationed exactly midway between two vertical walls parallel to each other. A man standing adjacent to buggy blows whistle momentarily. Instantly the buggy starts running towards one of the walls with a velocity 35 m/s. The driver of the buggy records first two echoes of the whistle with a delay of exactly one second. Speed of sound in air at that temperature is 350 m/s. Distance between the walls must be

(A)

(B)

(C) 1732.5 m

(D) 3465 m

Answer: (C)

Q: 28. The number of points at which not differentiable is

(A) 3

(B) 2

(C) 1

(D) 0

Answer: (C)

Q: 29. The circuit given below has a long straight wire AB placed horizontal along North-South direction. A small magnetic needle can be help anywhere near this wire. Choose the correct statement.

Circuit given below has a long straight wire AB placed horizontal along North-South direction

Circuit with Long Straight Wire AB

Circuit given below has a long straight wire AB placed horizontal along North-South direction

(A) North Pole of the magnetic needle will deflect towards East, if the compass is just above the wire

(B) North Pole of the magnetic needle will deflect towards West, if the compass is at exactly same level of the wire

(C) North Pole of the magnetic needle will deflect towards East, if the compass is just below the wire

(D) Magnetic needle will not deflect, if kept just below the wire

Answer: (C)

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