A black body has the property to _____________ all the radiation entering it.

Related Mcqs:

1. As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?

   A. shifts towards longer wavelength
   B. shifts towards shorter wavelength
   C. remain the same
   D. shifts towards longer as well as shorter wavelengths

2. After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?

   A. Increases because wavelength decreases
   B. Decreases because speed decreases
   C. Remains same
   D. Increases then decrease

3. Which one of the following radiation possesses maximum penetrating power ?

   A. X-rays
   B. B-rays
   C. γ-rays
   D. All have the equal penetrating powe

4. If the wavelength of incident radiation is increased in photoemission then_________________?

   A. The maximum kinetic energy of the photoelectrons increases
   B. The minimum kinetic energy of the photoelectrons decreases
   C. The minimum kinetic energy of the photoelectrons increases
   D. The average kinetic energy of the photoelectrons decreases

5. Radiation with wavelength longer than red lights______________?

   A. ultraviolet rays
   B. X-rays
   C. infra red radiation
   D. visible radiation

6. Radiation produced from TV picture tube is_____________?

   A. B-rays
   B. X-rays
   C. Far infrared
   D. Infrared

7. UV radiation can be produced by______________?

   A. Heating the filament
   B. Electron excitation in the gas
   C. Ionization of atoms
   D. All the above

8. When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?

   A. zero
   B. minimum
   C. infinity
   D. maximum

9. The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body ___________________?

   A. 10 cm
   B. 5 cm
   C. 15 cm
   D. 7.5 cm

10. The centripetal acceleration produced in a rotating body is commonly due to change on_________of body?

    A. magnitude
    B. direction 
    C. both
    D. None of these

    Submitted by: Bareera Mahmood