Class VIII

Which device is used to protect building from lightning conductor?
  1. Seismograph
  2. Lightning Conductor
  3. Barometer
  4. Thermal Conductor
Two objects with unlike charges will ...
  1. attract each other
  2. repel each other
  3. either attract or repel
  4. neither attract nor repel
Device can which be used to test whether an object is carrying charge or not is known as ...
  1. Electroscope
  2. Microscope
  3. Periscope
  4. Telescope
Name the scientist who showed that lightning and the spark from your clothes are essentially the same phenomena?
  1. Thomas Alva Edison
  2. Benjamin Franklin
  3. Franklin D. Roosevelt
  4. Isaac Newton
When charges move, they constitute an ...
  1. electric current
  2. magnetic effect
  3. heating effect
  4. all of the above
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