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Which instrument is used to record physical happenings at a distant place ?

  • Thermostat
  • Tonometer
  • Telemeter
  • Transponder

Answer: Option C

Explanation:

Thermostat - is used to regulate the temperature at a particular point.

Tonometer - is used to measure the pitch of a sound,

Transponder - is used to receive a signal and transmit a reply immediately.

Similar Questions :

1. Solar cell converts

  • Sound energy into electrical energy
  • Electrical energy into mechanical energy
  • Solar energy into electrical energy
  • Electrical energy into light energy

Answer: Option C

2. Who discovered Diode Bulb ?

  • Henry Becquerel
  • Sir J.S. Fleming
  • Lee De Forest
  • Archemedes

Answer: Option B

Explanation:

Sir J.S. Fleming discovered Diode Bulb in 1904,

Lee De Forest discovered Triode Bulb in 1906,

Archemedes discovered laws of floatation in 1827,

Henry Becquerel discovered Radioactivity in 1896.

3. What is unit of Work and Energy ?

  • Joule
  • kilogram
  • amphere
  • meter

Answer: Option A

4. If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this ?

  • Newton first law
  • Newton second law
  • Newton third law
  • Principle of conservation of linear momentum

Answer: Option D

5. The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.

  • True
  • False

Answer: Option B

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