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In a X - ray tube , electrons accelerate...

In a X - ray tube , electrons accelerated through a very high potential difference strike a metal target . If the potential difference is increased , the speed of the emitted X - rays :

A

The energy of X-rays produced increases.

B

The frequency of emitted rays increases.

C

Speed of the emitted rays decreases.

D

Wavelength of emitted rays increases.

Text Solution

Verified by Experts

The correct Answer is:
A, B
X-rays are electromagnetic waves which travel with the speed of light in vacuum and their speed depends on the medium of propagation. Thus the speed of emitted X-rays is independent of the applied potential difference. Thus option (c) is incorrect.
Wavelength of the emitted X-rays is inversely proportional to the applied potential difference. Thus wavelength of emitted X-rays decreases. So frequency increases.
The energy of the emitted rays increases with the increase in applied potential difference. Thus, the correct options are (a) and (b).
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