Physics question and answers for March 20, 2024
- Q How do frequency and wavelength affect the speed of a wave a Increasing wavelength increases the speed but increasing frequency decreases the speed b Increasing wavelength or frequency increases the...
- Q ustration Two loudspeakers as shown in fig below separated by a distance 3 m are in phase Assume that the amplitudes of the sound from the speakers is approximately same...
- Q Two vibrating tuning forks produce progressive waves given by y 4 sin 500xt and y 2 sin 506mt These tuning forks are held near the ear of a person The...
- Q 13 A string between x 0 and x vibrates in fundamental mode The amplitude A tension T and mass per unit length is given Find the total energy of the...
- Q 12 A plane wave given by equation y 0 04 sin 0 5xx 100nt where x and y are in meter and t in sec is incident normally on a...
- Q Superposition of waves 9 The figure shown a triangular pulse on a rope at t 0 It is approaching a fixed end at 2 cm s a Draw the pulse...
- Q 50 A taut string for which mass per unit length 5 0 x 10 2 kg m is under tension of 80 N How much power in watt upto one...
- Q 44 In a stationary wave that forms as a result of reflection of waves from an obstacle the ratio of the amplitude at an antinode to the amplitude at node...
- Q A sitar wire is replaced by another wire of same length and material but of triple radius If the tension in the wire remains the same the frequency will become...
- Q d may increase or decrease 23 The equation of a travelling wave is given as y 5 sin 10 t 0 01x along the x axis Here all quantities are...
- Q The linear density of a vibrating string is 1 3 10 4 kg m A transverse wave is propagating on the string and is described by the equation y 0...
- Q Two identical piano wires kept under the same tension T have a fundamental frequency of 600 Hz The fractional increase in the tension of one of the wires which will...
- Q A tuning fork makes 256 vibrations per second in air When the velocity of sound is 330 m s then wavelength of the tone emitted is Question Type Single Correct...
- Q The satellite orbiting at a height of 359 2 km sends a signal to the surface of the Earth The signal is transmitted by a radio wave that travels at...
- Q 0 If given wave has propagation constant 511 rad m then phase difference between two 7 49 particle having distance difference m is 22 1 5 rad 2 10 rad
- Q In a Young s double slit experiment 12 fringes are observed to be formed in a certain segment of the screen when light of wavelength 600 nm is used If...
- Q A travelling wave passes a point of observation At this point the time interval between successive crests is 0 2 seconds and The wavelength is 5 m The frequency is...
- Q Equation of a progressive wave is given by y 0 2cos 0 04t 02x 0 0 4 cm 8 cm The distance is expressed in cm and time in second...
- Q 20 Figure below shows the distance displacement Compare i the amplitude ii the wavelength of the two waves displacement cm A 10 5 0 0 5 10 2 B 6...
- Q c 73 d 13 16 How long after the beginning of motion is the displacement of a harmonically oscillating point equal to one half of its amplitude if the period...
- Q There is a string of length 3L whose end points are fixed The velocity of transverse wave in the string is v It is desired that the mid point of...
- Q In Exercises 17 22 specify a the period and b the amplitude and c identify the viewing window that is shown Caution Don t assume that the tick marks on...
- Q Question 1 1 point Which of the following changes could you make to alter the speed of a sound wave as it travels through the air a Increase the pitch...
- Q 22 Two vibrating strings of same length same cross section area and stretched to same tension are made of materials with densities p 2p Each string is fixed at both...
- Q Three waves producing displacement in the same direction of same frequency and of amplitudes 10 m 4 m and 7 m arrive at a point with successive phase difference of...
- Q 12 A taut string at both ends vibrates in its nth overtone The distance between adjacent Node and Antinode is found to be d If the length of the string...
- Q A vibrating string of certain length under a tension T resonates with a mode corresponding to the first overtone third harmonic of an air column of length 75 cm inside...
- Q Out of the given four waves 1 2 3 and 4 y asin kx of 1 y a sin t kx 2 y acos kx cot 3 y acos t...
- Q 8 A tuning fork of frequency 512 Hz is vibrated with a sonometer wire and 6 beats per second are heard The beat frequency reduces if the tension in the...
- Q The displacement harmonic wave is y sin 20 y in cm produced by a simple 10 The sin 2000nt T 17 periodic time and maximum velocity of the particles in...
- Q The equation of a progressive wave is given by y a sin 628t 31 4x If the distances are expressed in cm and time in seconds then the wave velocity...
- Q 17 A wire is 4 m long and has a mass 0 2 kg The wire is kept horizontally A transverse pulse is generated by plucking one end of the...
- Q What happens when the two waves above run into each other a The waves collide and temporarily cancel each other out b The waves reflect off of each other and...
- Q If the frequency of a wave in a medium is doubled increased by a factor of 2 what will happen to the wavelength a The wavelength will decrease by a...
- Q 16 Two mechanical waves y 2 sin 2x 50t 2x Y 4 sin 2 ax 100t propagate in a medium with same speed Choose the correct statement a The ratio...
- Q A couple students are sending waves down a length of string The students want to change the speed of the wave so they change the frequency of the waves but...
- Q According to the Doppler effect what happens to the frequency of a wave if the source is moving toward the receiver a It decreases b It behaves unpredictably c It...
- Q Q 14 An organ pipe P closed at one end vibrating in its first overtone and another pipe P2 open at the both ends vibrating in its third overtone are...
- Q Electric field associated with a light is E 100 sin 6 28 x 10 5 t 3 14 x 10 t V m If this light incident on a metal...
- Q In YDSE both slits produce equal intensities on the screen A 100 transparent thin film is placed in front of one of the slits Now the intensity on the centre...
- Q 14 A sings with a frequency n and B sings with a frequency 1 8 that of A If the energy remains the same and the amplitude of A is...
- Q On the basis of dimensions decide which of the following relations for the displacement of a particle undergoing simple harmonic motion is not correct FATTER Auta for for a fa...
- Q na anla y n 2 21LA Yn In 1 B 0 Two incoherent line sources S and S each emitting monochromatic light of wavelength are placed symmetrically in front of...
- Q A person B accidentally slips from a large building and screams with a sound of constant frequency n as he falls as shown in the figure The apparent frequency of...
- Q a Two slits 1mm apart are illuminated with a light of wavelength 500 nm What would be the width of each slit to obtain 10 maxima of double slit pattern...
- Q The function f t describes the distance from center of the shadow of a rider on a ferris wheel at time t f t 20 cos 30 Anwer the following...
- Q 25 180 A chord attached to a vibrating tuning fork divides it into 6 loops when its tension is 36 N The tension at which it will vibrate in 4...
- Q An air bubble in glass at a distance 3 cm from a convex surface of diameter 10 cm as shown The distance from surface at which the image of bubble...
- Q Two vibrating strings of the same material but length L and 2L have radii 2r and r respectively They stretched under the same tension Both the strings vibrate in their...
- Q 4 Unpolarized light of intensity 30 0 W cm is incident on two polarizing filters The axis of the first filter is at an angle of 27 counterclockwise from the...
- Q An organ pipe of length L sounds its fundamental tone at 30 0 Hz The pipe is open on both ends and the speed of sound in air is 343...
- Q A resistance R inductance L and capacitance C are connected in series to an ac source of voltage v having variable frequency If the TR LCV energy delivered by the...
- Q 2 A solar cell is coated with a transparent thin film of refractive index 1 45 in order to minimize reflective losses from the surface as shown in the figure...
- Q In a sine wave the position of different particles at time t 0 is shown in the figure The equation for this wave if it is travelling along positive x...
- Q In an X ray tube for an operating voltage the cut off wavelength is Ag If operating voltage is slightly increased by AV then choose correct statement A changes by...
- Q The displacement from the position of equilibrium of a point 4 cm from a source of sinusoidal oscillations is half the amplitude at the moment t T 6 T is...
- Q A beam of ordinary light is incident on a system of four polaroids which are arranged in succession such that each polaroid is turned through 30 with respect to the...
- Q The magnetic induction and the intensity of magnetic field inside an iron core of an are 1 Wbm 2and 150 Am 1 The relative permeability of electromagnet respectively iron is...
- Q The vibrations of a string fixed at both ends are described by the equation y 5sin 1 57x sin 314t in CGS system What are the wavelengths and the wave...
- Q The equation of standing wave is given as y 4 sin 200xt cos 0 05xx where y and x are in centimetres and in seconds then the incorrect statement is...
- Q Light source S1 S2 S3 S4 S5 S6 are in a line and all are coherent with same wavelength X Distance between consecutive sources is a Sources S and S...
- Q 5 The phase difference between two waves reaching a point is 2 What is the resultant amplitude if the individual amplitudes are 3 mm 4 mm b 6 mm c...
- Q For constructive interference to take place between two monochromatic light waves of wavelength A the path difference should be Question Type Single Correct Type 1 2n 1 2 2n 1...
- Q 14 Single slit of width d is illuminated by violet light of wavelength 400 nm and the width of the diffraction pattern is measured as y When half of the...
- Q 0 A parallel beam of monochromatic light is incident normally on a narrow slit A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident...
- Q 9 In a double slit experiment the angular width of a fringe is found to be 0 2 on a screen placed Im away The wavelength of light used is...
- Q 3 2Asine 4 2A sin A sin 0 2 9 If the length of a stretched string is shortened by 20 and the tension is increased by 21 then the...
- Q A particle is confined to move along the x axis under the action of a force F x that is derivable from the potential U x ax bx 1 Find...
- Q A tuning fork generates a wave given by y 0 1 sint 0 1 x 2t where x and y in metre and t in second The distance travelled by...
- Q A tuning fork of frequency n is held near the open end of a tube which is closed at the other end and the length of the tube is adjusted...
- Q A transverse harmonic wave of amplitude 1 0 cm and wavelength 3 0 m is travelling in positive x direction on a stretched string At an instant the particle at...
- Q 6 The wave profile in Figure 15 shows several particles at t 0 The wave has a time period of 8 seconds displacement m 0 3 0 2 0 27...
- Q ectromagnetic wave of frequency v 3 0 MHz passes from vacuum into a dielectric medium with relative permittivity 4 0 Then NEET Kar 2013 a wavelength is doubled and frequency...
- Q A wave travels on a light string The equation of the wave is Y A sin kx oot 30 It is reflected from a heavy string tied to an end...
- Q 9 At nodes in stationary waves a change in pressure and density are maximum b change in pressure and density are minimum c strain is zero d energy is maximum
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