MCQ
The penetrating power of X-rays depends upon :
  • the velocity of these rays
  • B
    current in the tube
  • C
    intensity of the rays
  • D
    nature of the cathode

Answer

Correct option: A.
the velocity of these rays
A

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Identify which of the following should be used for polarised light waves?
I. Sunglasses
II. Remove ultraviolet light
III. Reveal stress patterns

If a high power heater is connected to electric mains, then the bulbs in the house become dim, because there is a

(a) Current drop

(b) Potential drop

(c) No current drop

(d) No potential drop

A charge q coulomb moves in a circle at n revolutions per second and the radius of the circle is r metre. Then magnetic field at the centre of the circle is

(a)  N/amp/metre

(b)  N/amp/metre

(c) N/amp/metre

(d)  N/amp/metre

Wave which cannot travel in vacuum is

(a) X-rays  

(b) Infrasonic

(c) Ultraviolet

(d) Radiowaves

The distance between the circular plates of a parallel plate condenser 40mm  in diameter,  in order to have same capacity as a sphere of radius 1 metre is

(a) 0.01 mm

(b) 0.1 mm

(c) 1.0 mm

(d) 10  mm

A screen is placed a distance 40cm away from an illuminated object. A converging lens is placed between the source and the screen and it is attempted to form the image of the source on the screen. If no position could be found, the focal length of the lens:
  1. Must be less than 10cm.
  2. Must be greater than 20cm.
  3. Must not be greater than 20cm.
  4. Must not be less than 10cm.

The energy stored in the condenser is

(a) QV

(b)  

(c)  

(d)  

According to Faraday's laws of electrolysis, the amount of decomposition is proportional to

(a)  

(b) Electrochemical equivalent of the substance

(c)

(d)

The dimension of $\frac{1}{2} \varepsilon_0 E^2$ where $\varepsilon_0$ is the permittivity of free space and $E$ is the electric field, is
The binding energy per nucleon of helium is :