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Question 1
A
I, II and IV only . 
B
I and II only 
C
II and III only 
D
III and IV only 
Explanation.
Share Answer Of all the instruments used in measuring length,the micrometer screw gauge has the highest reading accuracy (0.01 mm), and is therefore used in measuring very small length such as diameter of a small ball bearing, and thickness of a piece of paper.

Correct Option:
B

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Question 2
A
1.7 ms-2 
B
3.50 ms-2 
C
1.00 ms-2 
D
2.00 ms-2 
Explanation.
Share Answer Acceleration = (AV)/At = (V2) - U1)/t2 - t1 = (35 - 15)/20 - 10 = (20)/10 = 2m5-2

Correct Option:
D

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Question 3
A
10 ms-1 
B
8 ms-1 
C
40 ms-1 
D
20 ms-1 
Explanation.
Share Answer At maximum height, the final velocity, v = 0
thus from v = u + at
0 = u - at
U = at = 10 x 4 = 40 mls

Correct Option:
C

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Question 4
A
III, IV and V only 
B
II, III and V only 
C
II, III and IV only 
D
I,II and III only 
Explanation.
Share Answer Simple harmonic motion is the motion of a body whose acceleration is directed towards a fixed point and is directly proportional to its displacement from point.

Correct Option:
B

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Question 5
A
11.50 kw 
B
12.60 kw 
C
11.25 kw 
D
12.10 kw 
Explanation.
Share Answer Power = (work done)/time taken = (mgh)/t
= (750 x 10 x 90)/60 = 11250w = 11.25kw

Correct Option:
C

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Question 6
A
0.8 
B
0.4 
C
D
0.6 
Explanation.
Share Answer coefficient of friction = (F)/R = (F)/ mg = (500)/80 x 10
= 0.625

Correct Option:
D


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Question 8
A
I and III only 
B
II and III only 
C
III and IV only 
D
I and II only 
Explanation.
Share Answer pressure in fluid is given by P = hlg.
fluid pressure depends on height of liquid column, h, density of liquid p and acceleration of free fall 8. it is therefore independent of type of container and constituents of the liquid

Correct Option:
C

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Question 9
A
6.0 x 10-2
B
7.6 x 10-2
C
1.8 x 10-2
D
6.6 x 10-2
Explanation.
Share Answer Work done on a stretched cord
= Average force x extension
= (10 + 0)/2 x 1.2 x 10-2
= 6.0 x 10-2J

Correct Option:
A

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Question 10
A
1400 kgm-3 
B
1250 kgm-3 
C
500 kgm-3 
D
1000 kgm-3 
Explanation.
Share Answer Weight of glycerine displaced = weight of water dispalced
Mgh glycerine = Mgh water
Pvgh glycerine = Pvgh water
0.4V P glycerine = (0.5v)/v.4v P water = 1.25
(Polycerine)/p water =
But density of substance = relative density x density of water = 1. 25 x 1000kgm3 = 1250kgm-3

Correct Option:
B

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