Question Detail

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.

1. Which instrument is used to measure sound under water ?

Hygrometer
Hygroscope
Hypsometer
Hydrophone

Answer: Option D

Explanation:

Hygrometer - is used to measure level of humidity,

Hygroscope - shows the changes in atmospheric humidity,

Hypsometer - is used to determine the boiling points of liquids.

2. Electric Motor converts

Electrical energy into mechanical energy
Mechanical energy into Electrical energy
Electrical energy into light energy
None of above

Answer: Option A

3. Nuclear sizes are expressed in a unit named

Fermi
Angstrom
Newton
Tesla

Answer: Option A

4. Atmospheric pressure is measured by

Tonometer
Pyrometer
Barometer
Thermometer

Answer: Option C

5. Light year is a unit of

Time
Light
Distance
Intensity of light

Answer: Option C