Tag Archives: physics

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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Resistors

  1.  What are resistors? 2.  What is the function of resistors in complicated circuits such as those of TVs and computers? 3.  Name four different types of resistors. 4.  What type of resistor is used to control the brightness … 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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Electric Field

1.  Why does the hair of a person touching the dome of a Van de Graaff generator stand on ends? 2.  Why doesn’t the person touching the dome of the Van de Graaff generator, that is over 100 000 volts, get … Continue reading

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