In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________?

Related Mcqs:

1. 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

2. 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

3. Radiations are used for the treatment of skin of a patient is_______________?

   A. Alpha rays
   B. Gamma rays
   C. Beta rays
   D. X-rays

4. Two identical metal balls with charges + 2Q and – Q are separated by some distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now be_________?

   A. F
   B. F/2
   C. F/4
   D. F/8

   Submitted by: Tauseef Ali

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

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

6. 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

7. Radiation produced from TV picture tube is_____________?

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

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. 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

10. Hydrogen atom does not emit X-rays because _________________?

    A. its energy levels are too close to each other
    B. its energy levels are too far apart
    C. it is too small in size
    D. it has a single electron