1
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
While measuring the speed of sound by performing a resonance column experiment, a student gets the first resonance condition at a column length of $$18$$ $$cm$$ during winter. Repeating the same experiment during summer, she measures the column length to be $$x$$ $$cm$$ for the second resonance. Then
A
$$18 > x$$
B
$$x > 54$$
C
$$54 > x > 36$$
D
$$36 > x > 18$$
2
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
$$10$$
3
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A whistle producing sound waves of frequencies $$9500$$ $$Hz$$ and above is approaching a stationary person with speed $$v$$ $$m{s^{ - 1}}.$$ The velocity of sound in air is $$300\,m{s^{ - 1}}.$$ If the person can hear frequencies upto a maximum of $$10,000$$ $$HZ,$$ the maximum value of $$v$$ upto which he can hear whistle is
A
$$15\sqrt 2 \,\,m{s^{ - 1}}$$
B
$${{15} \over {\sqrt 2 }}\,m{s^{ - 1}}$$
C
$$15\,\,m{s^{ - 1}}$$
D
$$30\,\,m{s^{ - 1}}$$
4
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
A string is stretched between fixed points separated by $$75.0$$ $$cm.$$ It is observed to have resonant frequencies of $$420$$ $$Hz$$ and $$315$$ $$Hz$$. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is
A
$$105$$ $$Hz$$
B
$$1.05$$ $$Hz$$
C
$$1050$$ $$Hz$$
D
$$10.5$$ $$Hz$$
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