1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of the following functions representing motion of a particle which represents SHM
(1)  y = sin$$\omega $$t $$-$$ cos$$\omega $$t
(2)  y = sin3$$\omega $$t
(3)  y = 5cos$$\left( {{{3\pi } \over 4} - 3\omega t} \right)$$
(4)  y = 1 + $$\omega $$t + $$\omega $$2t2
A
Only (1)
B
Only (4) does not represent SHM
C
Only (1) and (3)
D
Only (1) and (2)
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Two waves are represented by the equations
y1 = $$a$$sin($$\omega $$t + kx + 0.57) m and
y2 = acos($$\omega $$t + kx) m, where x is in meter and t $$in$$ sec. The phase difference between them is
A
1.0 radian
B
1.25 radian
C
1.57 radian
D
0.57 radian
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Sound waves travel at 350 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
A
decrease by a factor 10
B
increase by a factor 20
C
increase by a factor 10
D
decrease by a factor 20
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is
A
$${1 \over 2}{\varepsilon _0}{E^2}$$
B
$${{{E^2}Ad} \over {{\varepsilon _0}}}$$
C
$${1 \over 2}{\varepsilon _0}{E^2}Ad$$
D
$${\varepsilon _0}EAd$$
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