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Question Detail
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.
1. 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.
2. What is unit of Electrical Capacity ?
- henry
- farad
- volt
- ohm
Answer: Option B
Explanation:
henry is unit of Magnetic Induction,
volt is unit of Potential Difference,
ohm is unit of Electric Resistance.
3. The force which opposes the relative motion between different layers of liquid or gases is called
- Critical Velocity
- Streamline Flow
- Terminal Velocity
- Viscous Force
Answer: Option D
Explanation:
Critical Velocity - The maximum velocity upto which fluid motion is streamline is called Critical Velocity.
Streamline Flow - If velocity of all fluid particles is same all the time then it can be said in streamline flow.
Terminal Velocity - When a body falls in viscous medium, its velocity first increases and finally becomes constant. The constant velocity is called terminal velocity.
4. Which instrument is used to measure strength of direct current ?
- Stroboscope
- Streoscope
- Tangent Galvanometer
- Tachometer
Answer: Option C
Explanation:
Stroboscope - is used to view rapidly moving objects,
Streoscope - is used to view two dimensional pictures,
Tachometer - is used to determine rotational speed of a shaft (used in aeroplanes and motor boats).
5. Harry Brearley has invented
- Electric iron
- Electromagent
- Stainless Steel
- Gramophone
Answer: Option C
Explanation:
Harry Brearley of England has invented Stainless Steel in 1913,
Electric iron has been invented by H.W. Seeley of USA in 1882,
Electromagent has been invented by W.Sturgeon of England in 1824,
Gramophone has been invented by T.A. Edison of USA in 1878.
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