MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your BITSAT knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The max K.E of photo electrons depend upon light's |
| A. | intensity |
| B. | frequency |
| C. | wavelength |
| D. | energy |
| Answer» C. wavelength | |
| 2. |
Rest mass energy of electron is |
| A. | 1.02MeV |
| B. | 0.511KeV |
| C. | 0.511MeV |
| D. | 2.02MeV |
| Answer» D. 2.02MeV | |
| 3. |
At low temperature a body emits radiation of |
| A. | shorter wave length |
| B. | high frequencies |
| C. | longer wavelength |
| D. | low frequencies |
| Answer» D. low frequencies | |
| 4. |
The statement saying that energy is radiated or absorbed in discrete packets is given by |
| A. | plank |
| B. | Einstein |
| C. | Stephen |
| D. | Wien |
| Answer» B. Einstein | |
| 5. |
The mass of 70 kg man moving in car at 66kmh is |
| A. | 70 kg |
| B. | 100 kg |
| C. | infinite |
| D. | zero |
| Answer» B. 100 kg | |
| 6. |
An ideal black body is |
| A. | an ideal absorber |
| B. | an ideal radiator |
| C. | an ideal reflector |
| D. | both a and b |
| Answer» E. | |
| 7. |
When K.Emax of photoelectrons is zero then the frequency of incident photon relative to threshold frequency is |
| A. | less |
| B. | equal |
| C. | greater |
| D. | small |
| Answer» C. greater | |
| 8. |
Radiation with energy that is easily detected as quanta |
| A. | 1eV |
| B. | 1keV |
| C. | 1MeV |
| D. | 10-10eV |
| Answer» D. 10-10eV | |
| 9. |
According to special theory of relativity which one is not an absolute quantity |
| A. | time |
| B. | mass |
| C. | height |
| D. | both a and b |
| Answer» E. | |
| 10. |
The phenomena that can not be understood with the frame work of classical physics is |
| A. | black body radiation |
| B. | atomic spectra |
| C. | inertial frame |
| D. | both a and b |
| Answer» E. | |
| 11. |
Compton shift is max for scattering angle of |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 45 |
| Answer» D. 45 | |
| 12. |
An inertial frame of reference is that frame |
| A. | in which first law of motion is valid |
| B. | in which law of inertia is valid |
| C. | which is not moving with uniform velocity |
| D. | both a and b |
| Answer» E. | |
| 13. |
Earth can be considered as |
| A. | inertial frame |
| B. | non-inertial frame |
| C. | accelerated frame |
| D. | velocity frame |
| Answer» B. non-inertial frame | |
| 14. |
Length contraction happens only |
| A. | perpendicular to direction of motion |
| B. | along the direction of motion |
| C. | parallel to direction of motion |
| D. | both a and b |
| Answer» C. parallel to direction of motion | |
| 15. |
The behavior of matter on atomic level cannot be explained with |
| A. | modern physics |
| B. | classical physics |
| C. | relativistic mechanics |
| D. | atomic spectra |
| Answer» C. relativistic mechanics | |
| 16. |
In photocell cesium coated oxidized silver cathode emits electron for |
| A. | visible light |
| B. | ultraviolet |
| C. | infrared light |
| D. | x-rays |
| Answer» D. x-rays | |
| 17. |
Quantum effects are important only when observing |
| A. | small objects |
| B. | very large objects |
| C. | atomic size objects |
| D. | atomic spectra |
| Answer» D. atomic spectra | |
| 18. |
In e/m experiment we assume nature of electron as |
| A. | wave |
| B. | particle |
| C. | photon |
| D. | both a and b |
| Answer» C. photon | |
| 19. |
According to the theory of relativity mass of an object is |
| A. | depends on particles |
| B. | speed of light |
| C. | volume of object |
| D. | area of object |
| Answer» C. volume of object | |
| 20. |
Special theory of relativity treats problems involving |
| A. | inertial frame of reference |
| B. | non-inertial frame of reference |
| C. | non-accelerated frame of reference |
| D. | accelerated frame of reference |
| Answer» B. non-inertial frame of reference | |