1
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The wavelength of X-rays is of the order of
A
1 $$\mathop A\limits^o $$
B
1 $$\mu$$m
C
1 mm
D
1 cm
2
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following velocity and time graph

Image

Which one of the following is the value of average acceleration from 8 s to 12 s ?
A
8 m/s2
B
12 m/s2
C
2 m/s2
D
$$-$$1 m/s2
3
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If the focal length of a convex lens is 50 cm, then which one of the following is its power?
A
+2 D
B
+0.02 D
C
$$-$$0.5 D
D
+0.5 D
4
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A ball is released from rest and rolls down an inclined plane as shown in the following figure, requiring 4 s to cover a distance of 100 cm along the plane

Image

Which one of the following is the correct value of angle $$\theta$$ that the plane makes with the horizontal ? (g = 1000 cm/s2)
A
$$\theta$$ = sin$$-$$1 (1/98)
B
$$\theta$$ = sin$$-$$1 (1/20)
C
$$\theta$$ = sin$$-$$1 (1/80)
D
$$\theta$$ = sin$$-$$1 (1/100)
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