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Alexander Graham Bell invented

  • Telephone
  • Telescope
  • Television
  • Tank

Answer: Option A

Explanation:

Alexander Graham Bell of USA invented Telephone in 1876,

Telescope was invented by Hans Lippershey of Netherlands in 1608,

Television was invented by John Logie Bared of Scotland in 1926,

Tank was invented by Sir Ernest Swington of England in 1914.

Similar Questions :

1. Which instrument is used to measure heat radiation ?

  • Radar
  • Salinometer
  • Refractometer
  • Radio micrometer

Answer: Option D

Explanation:

Radar - is used to detect the direction and speed of an object by means of radiowaves,

Salinometer - is used to determine salinity of solutions,

Refractometer - is used to measure refractive indices.

2. Alfred Nobel invented

  • X ray
  • Diesel Engine
  • Dynamite
  • Dynamo

Answer: Option C

Explanation:

Alfred Nobel if Sweden invented Dynamite in 1867,

X ray was invented by Wilhelm Roentgen of Germany in 1895,

Diesel Engine was invented by Rudolf Diesel of Germany 1892,

Dynamo was invented by Michael Faraday of England in 1831.

3. 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

4. What is Hooke's Law ?

  • Stress is inversely proportional to strain.
  • Stress is directly proportional to strain.
  • Stress and strain are dependent on each other.
  • Stress and strain are independent of each other.

Answer: Option B

5. What is displacement ?

  • Longest distance covered by a body in a random direction.
  • Shortest distance covered by a body in a random direction.
  • Shortest distance covered by a body in a definite direction.
  • Longest distance covered by a body in a definite direction.

Answer: Option C

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