Home
Class 12
PHYSICS
To decrease the cut -off wavelength of c...

To decrease the cut -off wavelength of continuous X-ray by 25% the potential difference across the X-ray tube.

A

must be increased by `(100)/(3)%`,

B

must be decreased by 20%

C

must be increased by 25%

D

must be decreased by 25%

Text Solution

Verified by Experts

The correct Answer is:
A
`lambda=(hc)/(eV)`,`(lambda _(1))/(lambda_(2))=(v_(1))/(v_(2))`, `lambda _(2)=(3)/(4) lambda_(1)`, `v_(2)=(4)/(3)v_(1), (100)/(3)%` increases.
Promotional Banner

Topper's Solved these Questions

  • AC CIRCUITS

    FIITJEE|Exercise SOLVED PROBLEMS (SUBJECTIVE)Prob|9 Videos

  • AC CIRCUITS

    FIITJEE|Exercise SOLVED PROBLEMS(OBJECTIVE)prob|7 Videos

  • COLLISION

    FIITJEE|Exercise (NUMERICAL BASED QUESTIONS)|4 Videos

Similar Questions

Explore conceptually related problems

The cut-off wavelength of an X-ray depends on

When light of sufficiently high frequency is incident on a metallic surface, electrons are emitted from the metallic surface. This phenomenon is called photoelectric emission. Kinetic energy of the emitted photoelectrons depends on the wavelength of incident light and is independent of the intensity of light. Number of emitted photoelectrons depends on intensity. (hv-phi) is the maximum kinetic energy of emitted photoelectron (where phi is the work function of metallic surface). Reverse effect of photo emission produces X-ray. X-ray is not deflected by electric and magnetic fields. Wavelength of a continuous X-ray depends on potential difference across the tuve. Wavelength of charasteristic X-ray depends on the atomic number. Q. If potential difference across the tube is increased then

Consider the following two statements A and B and identify the correct choice in the given answer A : The characteristic X-ray spectrum depends on the nature of the material of the target B : The short wavelength limit of continuous X-ray spectrum varies inversely with the potential difference applied to the X-rays tube

Find the cut off walelength for the continuous X - rays coming form an X-ray tube operating at 40 kv.

Find the cutoff wavelength for the continuous X-rays coming from an X-ray tube operating at 40 kV .

Find the cutoff wavelength for the continuous X-rays coming form an X-ray tube operating at 30 kV.

An X-ray tube has nickel as target. The wavelength difference between the ka X-ray and the cut-off wavelength of continuous X-ray spectrum is 84 pm. Find the accelerating voltage applied in the X-ray tube. [Take hc = 12400 eV Å ]

For continuous X-rays produced wavelength is

For the production of X rays of wavelength 0.1 Å the minimum potential difference will be