With a D.C. power supply giving 10 mA at a potential difference of 50 kV. The power of the emitted X – ray is 5 watt. The efficiency of X - ray tube is
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a
10 %
b
1 %
c
5 %
d
25 %
answer is B.
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Detailed Solution
input power gives 50 kV x10 mA = 500 watt. output X ray has the power 5 W . So efficiency is 5500×100=1%
With a D.C. power supply giving 10 mA at a potential difference of 50 kV. The power of the emitted X – ray is 5 watt. The efficiency of X - ray tube is