1
AIPMT 2009
+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
2
AIPMT 2009
+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)
3
AIPMT 2009
+4
-1
Out of Syllabus
The driver of a car travelling with speed 30 m/s towards a hill sounds a horn of frequency 600 Hz. If the velocity of sound in air is 330 m/s, the frequency of reflected sound as heard by driver is
A
555.5 Hz
B
720 Hz
C
500 Hz
D
550 Hz
4
AIPMT 2008
+4
-1
A point performs simple harmonic oscillation of period T and the equation of motion is given by x = a sin($$\omega$$t + $$\pi$$/6). After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?
A
T/3
B
T/12
C
T/8
D
T/6
EXAM MAP
Medical
NEET