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Question Detail
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.
1. K. Macmillan invented
- Bicycle
- Barometer
- Calculating Machine
- Centigrade Scale
Answer: Option A
Explanation:
K. Macmillan of Scotland invented Bicycle in 1839.
Barometer was invented by E. Torricelli of Italy in 1644.
Calculating Machine was invented by Pascal of France in 1642.
Centigrade Scale was invented by A. Celsius of France in 1742.
2. Name of the instrument to measure atomspheric pressure ?
- Barometer
- Barograph
- Bolometer
- Callipers
Answer: Option A
Explanation:
Barograph - Recordings of atmospheric pressure,
Bolometer - Used to measure heat radiation,
Callipers - Used to measure inner and outer diameters of bodies.
3. Marie and Pierre Curie invented
- Radio
- Radium
- Radar
- Refrigerator
Answer: Option B
Explanation:
Marie and Pierre Curie of France invented Radium in 1898,
Radio was invented by G. Marconi of England in 1901,
Radar was invented by Dr. A.H. Taylor and L.C. Young of USA in 1922,
Refrigerator was invented by J. Harrison and A. Catlin of Britain in 1834.
4. When a body is immersed partly or wholly in a liquid, there is an apparent loss in weight of the body which is equal to the weight of liquid displaced by the body.
- True
- False
Answer: Option A
Explanation:
TRUE, it is Archimedes Principle.
5. Which instrument is used to measure changes in volume of substances ?
- Dyanamo
- Dilatometer
- Cyclotron
- Electroscope
Answer: Option B
Explanation:
Dyanamo - is used to convert mechanical energy into electrical energy,
Cyclotron - is a charged particle accelerator which can accelerate charged particles to high energies,
Electroscope - is used to detect the presence of an electric charge.
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