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2010 WAEC Physics Theory  An X-ray tube operates at a potential of 2500 V. If the power of the...

Physics
WAEC 2010

 An X-ray tube operates at a potential of 2500 V. If the power of the tube is 750 W, calculate the speed of the electron striking the target. [e = 1.6 x 10\(^{-19}\) C; mass of electron = 9.1 x 10\(^{-3}\) kg]

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Explanation

(a) eV \(\frac{1}{2}MV^2\)

V\(^2 = \frac{2eV}{m}\)

= \(\frac{2 \times 1.6 \times 10^{-19} \times 2500}{9.1 \times 10^{-31}}\)

V = \(\sqrt{8.79 \times 10^{14}}\)

= 2.96 x 10\(^{7}\)


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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free