1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A body of mass m is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass m is slightly pulled down and released, it oscillates with a time period of 3s. When the mass m is increased by 1 kg, the time period of oscillations becomes 5 s. The value of m in kg is
A
$${3 \over 4}$$
B
$${4 \over 3}$$
C
$${{16} \over 9}$$
D
$${9 \over {16}}$$
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
Three sound waves of equal amplitudes have frequencies (n $$-$$ 1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be
A
1
B
4
C
3
D
2
3
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
The second overtone of an open organ pipe has the same frquency as the first overtone of a closed pipe L metre long. The length of the open pipe will be
A
L
B
2L
C
$${L \over 2}$$
D
4L
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
Planck's constant (h), speed of light in vacuum (c) and Newton's gravitional constant (G) are three fundamental constants. Which of the following combinations of these has the dimension of length ?
A
$${{\sqrt {hG} } \over {{c^{3/2}}}}$$
B
$${{\sqrt {hG} } \over {{c^{5/2}}}}$$
C
$$\sqrt {{{hc} \over G}} $$
D
$$\sqrt {{{Gc} \over {{h^{3/2}}}}} $$
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