MCQOPTIONS
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MCQOPTIONS
This section includes 114 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The relation between frequency ?n? wavelength ?l? and velocity of propagation ?v? of wave is [EAMCET 1979; CPMT 1976, 85] |
| A. | \[n=v\lambda \] |
| B. | \[n=\lambda /v\] |
| C. | Velocity |
| D. | \[n=1/v\] |
| Answer» D. \[n=1/v\] | |
| 102. |
Which of the following statements is wrong [NCERT 1976, 79] |
| A. | Sound travels in straight line |
| B. | Sound is a form of energy |
| C. | 30 cm/sec |
| D. | Sound travels faster in vacuum than in air |
| Answer» E. | |
| 103. |
Assertion : The reverberation time dependent on the the shape of enclosure, position of source and observer. Reason : The unit of absorption coefficient in mks system is metric sabine. [EAMCET 2004] |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 120 Hz |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» F. | |
| 104. |
Assertion : When a beetle moves along the sand with in a few tens of centimeters of a sand scorpion the scorpion immediately turn towards the beetle and dashes to it Reason : When a beetle disturbs the sand, it sends pulses along the sands surface one set of pulses is longitudinal while other set is transverse. [AIIMS 2003] |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 6 seconds fast |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 105. |
Assertion : The flash of lightening is seen before the sound of thunder is heard. Reason : Speed of sound is greater than speed of light [AIIMS 2002] |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 1.11 m |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» D. If the assertion and reason both are false. | |
| 106. |
Assertion : Like sound, light can not propagate in vacuum. Reason : Sound is a square wave. It propagates in a medium by a virtue of damping oscillation. [AIIMS 2000] |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 680 m |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» E. If assertion is false but reason is true. | |
| 107. |
Assertion : Sound travel faster in solids than gases. Reason : Solid possess greater density than gases. [AIIMS 2000] |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | vm = vd |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» C. vm = vd | |
| 108. |
Assertion : The fundamental frequency of an open organ pipe increases as the temperature is increased. Reason : As the temperature increases, the velocity of sound increases more rapidly than length of the pipe. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 2.1 sec |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 109. |
Assertion : In the case of a stationary wave, a person hear a loud sound at the nodes as compared to the antinodes. Reason : In a stationary wave all the particles of the medium vibrate in phase. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 2 : 1 |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» D. If the assertion and reason both are false. | |
| 110. |
Assertion : Beats can also be observed by two light sources as in sound. Reason : Light sources have constant phase deference. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[1.66\times {{10}^{6}}\] m?1 |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» E. If assertion is false but reason is true. | |
| 111. |
Assertion : It is not possible to have interference between the waves produced by two violins. Reason : For interference of two waves the phase difference between the waves must remain constant. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 1092K |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 112. |
Assertion : Solids can support both longitudinal and transverse waves but only longitudinal waves can propagate in gases. Reason : For the propagation of transverse waves, medium must also neccessarly have the property of rigidity. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 268.5 m |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 113. |
Assertion : The change in air pressure effect the speed of sound. Reason : The speed of sound in a gas is proportional to square root of pressure. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | Both (a) and (b) |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» F. | |
| 114. |
Assertion : A tuning fork is made of an alloy of steel, nickel and chromium. Reason : The alloy of steel, nickel and chromium is called elinvar. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 19 m |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» C. 19 m | |