1
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
2
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
3
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)
4
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The coefficient of areal expansion of a material is 1.6 $$\times$$ 10$$-$$5 K$$-$$1. Which one of the following gives the value of coefficient of volume expansion of this material?
A
0.8 $$\times$$ 10$$-$$5 K$$-$$1
B
2.4 $$\times$$ 10$$-$$5 K$$-$$1
C
3.2 $$\times$$ 10$$-$$5 K$$-$$1
D
4.8 $$\times$$ 10$$-$$5 K$$-$$1
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