The main disadvantage of having a small focal spot on an X ray tube is:

M

Mr. Dubey • 52.26K Points
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Q. The main disadvantage of having a small focal spot on an X ray tube is:

(A) Heat is conducted away too fast

(B) Sharper radiographic images may be achieved with a larger focal spot

(C) A smaller focal spot is limited to lower tube currents because of the potential damage from overheating

(D) None of the above

Correct : Option (C)

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