1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
A $$2$$ $$kg$$ block slides on a horizontal floor with a speed of $$4m/s.$$ It strikes a uncompressed spring, and compress it till the block is motionless. The kinetic friction force is $$15N$$ and spring constant is $$10, 000$$ $$N/m.$$ The spring compresses by
A
$$8.5cm$$
B
$$5.5cm$$
C
$$2.5cm$$
D
$$11.0cm$$
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
An electric charge $${10^{ - 3}}\,\,\mu \,C$$ is placed at the origin $$(0,0)$$ of $$X-Y$$ co-ordinate system. Two points $$A$$ and $$B$$ are situated at $$\left( {\sqrt 2 ,\sqrt 2 } \right)$$ and $$\left( {2,0} \right)$$ respectively. The potential difference between the points $$A$$ and $$B$$ will be
A
$$4.5$$ volts
B
$$9$$ volts
C
zero
D
$$2$$ volts
3
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
A sound absorber attenuates the sound level by $$20$$ $$dB$$. The intensity decreases by a factor of
A
$$100$$
B
$$1000$$
C
$$10000$$
D
$$10$$
4
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The displacement of an object attached to a spring and executing simple harmonic motion is given by $$x = 2 \times {10^{ - 2}}$$ $$cos$$ $$\pi t$$ metre. The time at which the maximum speed first occurs is
A
$$0.25$$ $$s$$
B
$$0.5$$ $$s$$
C
$$0.75$$ $$s$$
D
$$0.125$$ $$s$$
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