MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
At low temperature, body emits radiations of |
| A. | shorter wave length |
| B. | high frequencies |
| C. | longer wavelength |
| D. | low frequencies |
| Answer» D. low frequencies | |
| 2. |
An ideal black body is |
| A. | an ideal absorber |
| B. | an ideal radiator |
| C. | an ideal reflector |
| D. | both a and b |
| Answer» E. | |
| 3. |
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 | |
| 4. |
Compton shift is max for scattering angle of |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 45 |
| Answer» D. 45 | |
| 5. |
Earth can be considered as |
| A. | inertial frame |
| B. | non-inertial frame |
| C. | accelerated frame |
| D. | velocity frame |
| Answer» B. non-inertial frame | |
| 6. |
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 | |
| 7. |
Max K.E of photo electrons depend upon light's |
| A. | intensity |
| B. | frequency |
| C. | wavelength |
| D. | energy |
| Answer» C. wavelength | |
| 8. |
Phenomena that cannot be understood with frame work of classical physics is |
| A. | black body radiation |
| B. | atomic spectra |
| C. | inertial frame |
| D. | both a and b |
| Answer» E. | |
| 9. |
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 | |
| 10. |
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 | |
| 11. |
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. | |
| 12. |
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 | |
| 13. |
According to theory of relative 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 | |
| 14. |
In photocell caesium, coated oxidized silver cathode emits electrons for |
| A. | visible light |
| B. | ultraviolet |
| C. | infrared light |
| D. | x-rays |
| Answer» D. x-rays | |
| 15. |
An inertial frame of reference is 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. | |
| 16. |
Rest mass energy of an electron is |
| A. | 1.02 MeV |
| B. | 0.511KeV |
| C. | 0.511 MeV |
| D. | 2.02 MeV |
| Answer» D. 2.02 MeV | |