AIPMT 2009 | Waves Question 39 | Physics

AIPMT 2009

MCQ (Single Correct Answer)

-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

y = (0.02) m sin (15.7 x $$-$$ 2010t)

y = (0.02) m sin (15.7 x + 2010t)

y = (0.02) m sin (7.85 x $$-$$ 1005t)

y = (0.02) m sin (7.85 x + 1005t)

AIPMT 2009

MCQ (Single Correct Answer)

-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

AIPMT 2008

MCQ (Single Correct Answer)

-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

+ve x direction with frequency 1 Hz and wavelength $$\lambda $$ = 0.2 m.

$$-$$ve x direction with amplitude 0.25 m and wavelength $$\lambda $$ = 0.2 m.

$$-$$ve x direction with frequency 1 Hz.

+ve x direction with frequency $$\pi $$ Hz and wavelength $$\lambda $$ = 0.2 m.

AIPMT 2008

MCQ (Single Correct Answer)

-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

$${\left( {\sqrt {{I_1}} - \sqrt {{I_2}} } \right)^2}$$

$$2\left( {{I_1} + {I_2}} \right)$$

$${{I_1} + {I_2}}$$

$${\left( {\sqrt {{I_1}} + \sqrt {{I_2}} } \right)^2}$$

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