Tag Archives: physics for IGSCSE

Radioactive Decay

Radioactive isotopes of elements have unstable arrangement of neutrons and protons in their nuclei. To become more stable, they emit alpha or beta particles. But this changes the number of protons and neutrons in the nucleus resulting in the formation … Continue reading

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Sources of Nuclear radiation

  Nuclear radiation can damage or destroy living cells or make cells grow abnormally causing cancer. The most dangerous is radiation caused by radioactive materials absorbed by the body. Radioactive gas and dust may be taken into the body along with … Continue reading

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Nuclear Radiation

Discovery: Henry Becquerel discovered radioactivity accidentally in 1896.   Nuclear radiation: Some elements contain atoms with unstable nuclei. With time, the unstable nucleus disintegrates. While doing so, it shoots out a tiny particle and sometimes wave energy as well. Since … Continue reading

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Voltage

1.  What is Voltage? 2.  What is the scientific name for voltage? 3.  Voltage is measured with a ____________. 4.  The unit of voltage is __________. 5.  If a cell has 1 volt, this means that 1 joule of potential … Continue reading

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Electric Current

1.  What is an electric circuit? 2.  What is the function of a battery in a circuit? 3.  What happens when the switch is turned off in a circuit? 4.  Draw a circuit diagram using some of these circuit symbols. … Continue reading

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