MCQOPTIONS
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MCQOPTIONS
This section includes 778 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Velocity of sound in vacuum is ____________________? |
| A. | 332 ms-1 |
| B. | 320 ms-1 |
| C. | Zero |
| D. | 224 ms-1 |
| Answer» D. 224 ms-1 | |
| 102. |
According to Newton sound travel in air under the conditions of_____________________? |
| A. | adiabatic |
| B. | isothermal |
| C. | isobaric |
| D. | isochoric |
| Answer» D. isochoric | |
| 103. |
Ultrasonic have__________________? |
| A. | frequency in the audible range |
| B. | frequency is greater than 20 kHz |
| C. | frequency lower than 20 Hz |
| D. | all of above |
| Answer» C. frequency lower than 20 Hz | |
| 104. |
The velocity of sound is greatest in___________________? |
| A. | Water |
| B. | air |
| C. | copper |
| D. | ammonia |
| Answer» D. ammonia | |
| 105. |
The velocity of sound in air would become double than its velocity at 0°C at temperature ? |
| A. | 313°C |
| B. | 586°C |
| C. | 819°C |
| D. | 1172°C |
| Answer» D. 1172°C | |
| 106. |
The number of beats produced per second is equal to____________________? |
| A. | the sum of the frequencies of two tuning forks |
| B. | the difference of the frequencies of two tuning forks |
| C. | the ratio of the frequencies of two tuning forks |
| D. | the frequency of either of the two tuning forks |
| Answer» C. the ratio of the frequencies of two tuning forks | |
| 107. |
Boyles law helds for ideal gases in________________? |
| A. | isochoric processes |
| B. | isobaric processes |
| C. | isothermal processes |
| D. | adiabatic processes |
| Answer» D. adiabatic processes | |
| 108. |
We prefer mercury as a thermometric substance because______________? |
| A. | Over a wide range of temperature its expansion is uniform |
| B. | It does not stick to thermometer glass |
| C. | It opaque to light |
| D. | All of above |
| Answer» E. | |
| 109. |
Which one is not an example of adiabatic process ? |
| A. | rapid escape of air from a burst tyre |
| B. | rapid expansion of air |
| C. | conversion of water into ice in refrigerator |
| D. | cloud formation in the atmosphere |
| Answer» D. cloud formation in the atmosphere | |
| 110. |
If the volume of a gas is held constant and we increase its temperature then_______________? |
| A. | its pressure is constant |
| B. | its pressure rises |
| C. | its pressure falls |
| D. | any of above |
| Answer» C. its pressure falls | |
| 111. |
In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________? |
| A. | Mercury takes a long time to contract |
| B. | The amount of mercury use is very small |
| C. | The capillary tube has a small constriction near the bulb |
| D. | The capillary tube is very narrow |
| Answer» D. The capillary tube is very narrow | |
| 112. |
The sensitivity of a galvanometer is given by__________________? |
| A. | C/BAN |
| B. | CAN/B |
| C. | BAN/C |
| D. | ABC/N |
| Answer» B. CAN/B | |
| 113. |
Normal human body temperature 98.6°F corresponds to______________? |
| A. | 37°C |
| B. | 42°C |
| C. | 55°C |
| D. | 410°C |
| Answer» B. 42°C | |
| 114. |
Numerical value of Boltzmanns constant is______________? |
| A. | 1.38×10-31JK-1 |
| B. | 3.18×10-31JK-1 |
| C. | 3.18×10-23JK-1 |
| D. | 1.38×10-23JK-1 |
| Answer» E. | |
| 115. |
The Fahrenheit and centigrade scales agree to________________? |
| A. | 40 |
| B. | 15.5 |
| C. | 542 |
| D. | 273 |
| Answer» B. 15.5 | |
| 116. |
The specially designed semi-conductor diodes used as fast counters in electronic circuits are_______________? |
| A. | The light emitting diodes |
| B. | Photo diodes |
| C. | Photo voltaic cell |
| D. | Solar cells |
| Answer» C. Photo voltaic cell | |
| 117. |
Which one is the correct relation for fundamental frequency of open and closed pipe ? |
| A. | fopen = 2 fclosed |
| B. | fclosed = 2fopen |
| C. | fopen = fclosed |
| D. | fopen = 1 / f closed |
| Answer» B. fclosed = 2fopen | |
| 118. |
The speed of sound in hydrogen is _____________ time than that in oxygen? |
| A. | Two times |
| B. | Three times |
| C. | Four time |
| D. | Six time |
| Answer» D. Six time | |
| 119. |
The speed of stationary waves in a stretched string are independent of___________________? |
| A. | Number of loops |
| B. | Tension in the string |
| C. | Point where string is plucked |
| D. | both A and C |
| Answer» E. | |
| 120. |
Newton estimated the speed of sound _____________________? |
| A. | 281m/sec |
| B. | 333m/sec |
| C. | 340m/sec |
| D. | all of the above |
| Answer» B. 333m/sec | |
| 121. |
When two identical traveling waves are superimposed, the velocity of the resultant wave__________________? |
| A. | decreases |
| B. | increases |
| C. | remains unchanged |
| D. | becomes zero |
| Answer» D. becomes zero | |
| 122. |
Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________? |
| A. | Dopplers effect |
| B. | Interference of waves |
| C. | Beats phenomena |
| D. | All of these |
| Answer» B. Interference of waves | |
| 123. |
If stretching force T of wire increases, then its frequency __________________? |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | any of above |
| Answer» C. remains the same | |
| 124. |
The waves that require a material medium for their propagation are called__________________? |
| A. | matter waves |
| B. | electromagnetic waves |
| C. | carrier waves |
| D. | mechanical waves |
| Answer» E. | |
| 125. |
Dimension of pressure is__________________? |
| A. | MLT |
| B. | ML-1T-1 |
| C. | ML-1T-2 |
| D. | ML-2T-2 |
| Answer» D. ML-2T-2 | |
| 126. |
Temperature is a property which determines_________________? |
| A. | How much heat a body contains |
| B. | Whether a body will feel hot or cold to touch |
| C. | In which direction heat will flow between two systems |
| D. | How much total absolute energy a body has |
| Answer» D. How much total absolute energy a body has | |
| 127. |
For the successful operation of Heat engine which condition should be met ? |
| A. | cyclic process |
| B. | operated at certain temperature difference |
| C. | both A and B |
| D. | none of these |
| Answer» D. none of these | |
| 128. |
At constant temperature the graph between V and 1/P is_____________? |
| A. | Hyperbola |
| B. | Parabola |
| C. | A curve of any shape |
| D. | A straight lime |
| Answer» E. | |
| 129. |
We can produce heat by________________? |
| A. | Frictional process |
| B. | Chemical processes |
| C. | Electrical processes |
| D. | All of the above |
| Answer» E. | |
| 130. |
The scales of temperature are based on two fixed points which are_________________? |
| A. | The temperatures of water at 0? 100?C |
| B. | The temperature of melting ice and boiling water at atmospheric pressure |
| C. | The temperatures of ice cold and boiling water |
| D. | The temperatures of frozen and boiling mercury |
| Answer» C. The temperatures of ice cold and boiling water | |
| 131. |
The pressure exerted by a column of mercury 76cm high and at 0°C is called_______________? |
| A. | 1 atmosphere |
| B. | 1 Newton per square meter |
| C. | 1 Pascal |
| D. | data is insufficient |
| Answer» B. 1 Newton per square meter | |
| 132. |
Metabolism is the name of a process in which energy transformation takes place within______________? |
| A. | Heat engine |
| B. | Human body |
| C. | Atmosphere |
| D. | Laboratory |
| Answer» C. Atmosphere | |
| 133. |
The work done in the isochoric process is________________? |
| A. | constant |
| B. | variable |
| C. | zero |
| D. | depends on situation |
| Answer» D. depends on situation | |
| 134. |
When the source of sound moves away form a stationary listener then ______________ occurs? |
| A. | an apparent increase in frequency |
| B. | an apparent decrease in frequency |
| C. | an apparent decrease in wavelength |
| D. | no apparent change in frequency |
| Answer» C. an apparent decrease in wavelength | |
| 135. |
The purpose of flywheel in the engines is________________? |
| A. | to smooth out the energy variation |
| B. | to add more weight to engine to work it stable |
| C. | to start engine |
| D. | both A and B |
| Answer» B. to add more weight to engine to work it stable | |
| 136. |
Adiabatic process is also called______________? |
| A. | Heat exchange process |
| B. | Heating process |
| C. | Isentropic process |
| D. | All of the above |
| Answer» D. All of the above | |
| 137. |
Which quantity is a state function_______________? |
| A. | internal energy |
| B. | heat supply |
| C. | pressure |
| D. | volume |
| Answer» B. heat supply | |
| 138. |
Petrol engine is a________________? |
| A. | C.I engine |
| B. | SI engine |
| C. | IC engine |
| D. | all the above |
| Answer» E. | |
| 139. |
The unit of entropy is________________? |
| A. | J.K |
| B. | J/K |
| C. | N.m/sec |
| D. | Kgm2/sec2.K |
| Answer» B. J/K | |
| 140. |
On loading the prong of a tuning form with wax its frequency____________________? |
| A. | increases |
| B. | decreases |
| C. | remains unchanged |
| D. | may increase or decrease |
| Answer» C. remains unchanged | |
| 141. |
Increase in velocity of sound in the air for 1°C rise in temperature is_________________? |
| A. | 1.61 ms-1 |
| B. | 61.0 ms-1 |
| C. | 0.61 ms-1 |
| D. | 2.00 ms-1 |
| Answer» D. 2.00 ms-1 | |
| 142. |
The normal ear is the most sensitive in the frequency range___________________? |
| A. | 20000 to 30000 hertz |
| B. | 10 to 20 hertz |
| C. | 2000 to 4000 hertz |
| D. | 6000 to 8000 hertz |
| Answer» D. 6000 to 8000 hertz | |
| 143. |
Resistance of an ideal insulator is __________________? |
| A. | infinite |
| B. | zero |
| C. | finite |
| D. | depends upon nature |
| Answer» B. zero | |
| 144. |
The velocity of sound in air would become double than its velocity at 0°C at temperature________________? |
| A. | 313°C |
| B. | 586°C |
| C. | 819°C |
| D. | 1172°C |
| Answer» D. 1172°C | |
| 145. |
The periodic alternation of sound between maximum and minimum loudness are called___________________? |
| A. | silence zone |
| B. | interference |
| C. | beats |
| D. | resonance |
| Answer» D. resonance | |
| 146. |
Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________? |
| A. | Longitudinal |
| B. | Transverse |
| C. | Periodic |
| D. | both A and C |
| Answer» E. | |
| 147. |
Photoelectric effect was given by ____________________? |
| A. | Hertz |
| B. | Fresnel |
| C. | Einstein |
| D. | Plank |
| Answer» D. Plank | |
| 148. |
Average translational kinetic energy per molecule of an ideal gas is given by_____________? |
| A. | 3NaT/2R |
| B. | 2NaT/3 |
| C. | 3RT/2Na |
| D. | 3Na/2RT |
| Answer» D. 3Na/2RT | |
| 149. |
Circuit which gives continuously varying potential is called _______________________? |
| A. | complex network |
| B. | wheat stone bridge |
| C. | potential divider |
| D. | all of above |
| Answer» D. all of above | |
| 150. |
Reciprocal of resistivity is called__________________? |
| A. | resistance |
| B. | inductance |
| C. | conductivity |
| D. | flexibility |
| Answer» D. flexibility | |