Radiation produced from TV picture tube is_____________?

Related Mcqs:

1. UV radiation can be produced by______________?

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

2. Final image produced by a compound microscope is_____________?

   A. real and inverted
   B. real and erect
   C. virtual and erect
   D. virtual and inverted

3. Radiation with wavelength longer than red lights______________?

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

4. 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

5. 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

6. The radiations emitted form hydrogen filled discharge tube show____________?

   A. band spectrum
   B. line spectrum
   C. continuous spectrum
   D. absorption spectrum

7. In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

   A. he/ev
   B. he/Vc
   C. eV/h
   D. impossible to predict

8. Maximum frequency in the spectrum from X-ray tube is directly proportional to the______________?

   A. Number of incident electron i.e. filament current
   B. The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated
   C. The soft target which can easily emit electrons
   D. All of above are correct

9. 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

10. Which instrument is suitable to measure the internal diameter of a test tube?

    A. Vernier Callipers
    B. Screw Gauge
    C. Bore Gauge
    D. None

    Submitted by: Warraich