Class X

The SI unit of ___ is named after Andre Marie Ampere.
  1. power
  2. potential difference
  3. electric current
  4. energy
: The popular name of bio gas is
  1. Gobar gas
  2. Marsh gas
  3. Ethane gas
  4. Helium gas
Which of the following is normally used in solar cookers for trapping solar energy?
  1. Solar panels
  2. Silicon cells
  3. Mirrors
  4. Any of above
Which of the following produces energy because of temperature difference at various levels in ocean.
  1. Tidal energy
  2. Wave energy
  3. Solar energy
  4. Ocean thermal energy
Which method is used to produce electricity in thermal power plant?
  1. By heating chargeable cells
  2. By boiling water
  3. By pushing pistons by heat energy
  4. Any of above
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