Class VIII

Which scale is used to measure the magnitude of earth quake?
  1. Celsius
  2. Kelvin
  3. Richter
  4. Pascal
Which device is used to protect building from lightning conductor?
  1. Seismograph
  2. Lightning Conductor
  3. Barometer
  4. Thermal Conductor
When charges move, they constitute an ...
  1. electric current
  2. magnetic effect
  3. heating effect
  4. all of the above
In thunderstorm, the charges accumulate near the upper edges of clouds are
  1. negatively charged
  2. positively charged
  3. neutral
  4. none of these
Two objects with like charges will ... 
  1. Attract each other 
  2. Repel each other 
  3. Either attract or repel 
  4. Neither attract nor repel 
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