1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A wave in a string has an amplitude of 2 cm. The wave travels in the +ve direction of x axis with a speed of 128 m/s. and it is noted that 5 complete waves fit in 4m length of the string. The equation describing the wave is
A
y = (0.02) m sin (15.7 x $$-$$ 2010t)
B
y = (0.02) m sin (15.7 x + 2010t)
C
y = (0.02) m sin (7.85 x $$-$$ 1005t)
D
y = (0.02) m sin (7.85 x + 1005t)
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20 N force. Mass per unit length of both the strings is same and equal to 1 g/m. When both the strings vibrate simultaneously the number of beats is
A
7
B
8
C
3
D
5
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
The wave described by y = 0.25 sin(10$$\pi $$x $$-$$ 2$$\pi $$t), where x and y are in metres and t in seconds, is a wave travelling along the
A
+ve x direction with frequency 1 Hz and wavelength $$\lambda $$ = 0.2 m.
B
$$-$$ve x direction with amplitude 0.25 m and wavelength $$\lambda $$ = 0.2 m.
C
$$-$$ve x direction with frequency 1 Hz.
D
+ve x direction with frequency $$\pi $$ Hz and wavelength $$\lambda $$ = 0.2 m.
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Two periodic waves of intensities $$I$$1 and $$I$$2 pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is
A
$${\left( {\sqrt {{I_1}} - \sqrt {{I_2}} } \right)^2}$$
B
$$2\left( {{I_1} + {I_2}} \right)$$
C
$${{I_1} + {I_2}}$$
D
$${\left( {\sqrt {{I_1}} + \sqrt {{I_2}} } \right)^2}$$
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