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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. What is the relation between wavelength, frequency and velocity ?
- velocity of wave = frequency * wavelength
- velocity of wave = frequency/wavelength
- velocity of wave = wavelength/frequency
- None of above
Answer: Option A
2. newton is used to measure
- Speed
- Volume
- Force
- Area
Answer: Option C
3. 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).
4. 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
5. Who discovered Diode Bulb ?
- Henry Becquerel
- Sir J.S. Fleming
- Lee De Forest
- Archemedes
Answer: Option B
Explanation:
Sir J.S. Fleming discovered Diode Bulb in 1904,
Lee De Forest discovered Triode Bulb in 1906,
Archemedes discovered laws of floatation in 1827,
Henry Becquerel discovered Radioactivity in 1896.
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