Question Detail

The rotational effect of a force on a body about an axis of rotation is described in terms of

Centre of gravity
Centripetal force
Centrifugal force
Moment of force

Answer: Option D

1. The absorption of ink by blotting paper involves

capillary action phenomenon
viscosity of ink
siphon action
diffusion of ink through the blotting

Answer: Option A

2. Sudden fall in barometer is indication of

Storm
Rain
Tide
Clear weather

Answer: Option A

3. 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.

4. Which instrument is used to measure pressure of gases ?

Manometer
Machmeter
Magnetometer
Micrometer

Answer: Option A

Explanation:

Machmeter - is used to determine the speed of an aircraft in terms of speed of sound,

Magnetometer - is used to compare magnetic movements and fields,

Micrometer - is used to convert sound waves into electrical vibrations.