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 Form 4 Physics X-Rays Questions and Answers

Figure 5 shows a narrow beam of X-rays passing between two metal plates in air. The plates are connected in series with a switch, a cell
and a milliammeter.
figx-ray652020939.JPG
It is observed that when the switch is closed a current flows in the milliammeter. Explain this observation

 (3m 4s)
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