| 1.) Longitudinal waves cannot be travel through | |
| A) | solids |
| B) | liquids |
| C) | gases |
| D) | vaccum |
| 2.) The echo and original sound differ in | |
| A) | Frequency |
| B) | Velocity |
| C) | Intensity |
| D) | wavelength |
| 3.) The type of the waves which cannot be transmitted through fluids | |
| A) | longitudinal waves |
| B) | transverse waves |
| C) | electromagnetic waves |
| D) | Progressive waves |
| 4.) Sound travels in rocks in the form of | |
| A) | non-elastic waves |
| B) | only transverse elastic waves |
| C) | only longitudinal elastic waves |
| D) | both longitudinal and transverse elastic waves |
| 5.) The waves which require material medium for their transmission are: | |
| A) | Body waves |
| B) | Mechanical waves |
| C) | Sound waves |
| D) | All the above |
| 6.) The phase differrence between two particles equidistant and lining on either side of a node is | |
| A) | o‘>0o |
| B) | o‘>45o |
| C) | o‘>90o |
| D) | o‘>180o |
| 7.) The property of a progressive wave that does not depend up on other characteristics | |
| A) | Amplitude |
| B) | Frequency |
| C) | Wave velocity |
| D) | wavelength |
| 8.) Hydrophone is based on | |
| A) | Beats |
| B) | Echo |
| C) | Droppler effect |
| D) | Super position of sound waves |
| 9.) Doppler effect is applicable to | |
| A) | Sound waves |
| B) | Light waves |
| C) | Radio waves |
| D) | All the above |
| 10.) An open window acts as | |
| A) | Perfect reflector |
| B) | perfect absorber |
| C) | Both 1&2 |
| D) | neither 1 nor 2 |
| 11.) Multiple reflections are observed in | |
| A) | Stethoscope |
| B) | Reverberations |
| C) | Diffraction |
| D) | Both 1&2 |
| 12.) What determines the frequency of natural oscillations of system | |
| A) | inertia |
| B) | elasticity |
| C) | mode of vibrations |
| D) | All the above. |
| 13.) Resonance is a special case of | |
| A) | free vibrations |
| B) | forced vibrations. |
| C) | Damped vibrations |
| D) | Maintained vibrations |
| 14.) The longitudinal wave velocity in solids in bulk | |
| A) | does not depend on wavelength and frequency |
| B) | depends on bulk modulus ‘k’ and rigidity modulus ‘n’. |
| C) | both |
| D) | none |
| 15.) Sound waves can diffract easily because | |
| A) | The wave length is very very small |
| B) | The wave length is more |
| C) | It can reflect |
| D) | It can refract |
| 16.) The echo and original sound have same | |
| A) | Frequency |
| B) | Amplitude |
| C) | Intensity |
| D) | All the above |
| 17.) The longitudinal waves in air differ from the electromagnetic waves in that they cannot be | |
| A) | Reflected |
| B) | Refracted |
| C) | diffracted |
| D) | polarised |
| 18.) The persistance of sound in a hall is called | |
| A) | resonance |
| B) | acoustics |
| C) | reverberations |
| D) | articulation |
| 19.) Incase of damped oscillation amplitude | |
| A) | decreases linearly |
| B) | increases linearly |
| C) | decreases exponentially |
| D) | increases exponentially |
| 20.) If a string is vibrating in nth harmonic the total number of nodes produced is | |
| A) | n-1 |
| B) | n+1 |
| C) | n+2 |
| D) | n-2 |
| 21.) The waves which do not require any material medium for the propagation are: | |
| A) | Matter waves |
| B) | Debroglie waves |
| C) | Electromagnetic waves |
| D) | Surface waves |
| 22.) If a stretched string is plucked at the centre | |
| A) | even harmonics are present |
| B) | odd harmonics are absent |
| C) | even harmonics are absent |
| D) | All harmonics are present |
| 23.) When a tuning fork is heated its frequency | |
| A) | increases |
| B) | decreases |
| C) | remains same |
| D) | become erratic |
| 24.) At resonance | |
| A) | The amplitude is maximum,theoretically infinite |
| B) | The amplitude is minimum |
| C) | Amplitude is zero |
| D) | Amplitude is either zero or minimum |
| 25.) If a string be rubbed along its length,the vibrations are | |
| A) | transverse |
| B) | longitudinal |
| C) | both 1 and 2 |
| D) | neither 1 nor 2 |
Saturday, November 8, 2008
sound
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