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 of the following is an electromagnetic wave ?

Cathode rays
Sound wave
Ultrasonic wave
Infra red rays

Answer: Option D

2. Who discovered Atom ?

Madam Curie
James Chadwick
Rutherford
John Dalton

Answer: Option D

Explanation:

John Dalton discovered Atom in 1808,

Madam Curie discovered Radium in 1898,

James Chadwick discovered Neutron in 1932,

Rutherford discovered Proton in 1919.

3. 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.

4. Which instrument is used to measure depth of ocean ?

Galvanometer
Fluxmeter
Endoscope
Fathometer

Answer: Option D

Explanation:

Galvanometer - measures electric current,
Fluxmeter - measures magnetic flux,
Endoscope - used to examine internal parts of the body.

5. Radian is used to measure

Temperature
Intensity of Flame
Angle
Solid Angle

Answer: Option C

Explanation:

Kelvin is used to measure Temperature,

Candela is used to measure Intensity of flame,

Steredian is used to measure Solid Angle.