Question Detail
newton is used to measure
- Speed
- Volume
- Force
- Area
Answer: Option C
1. Which instrument is used to measure sound under water ?
- Hygrometer
- Hygroscope
- Hypsometer
- Hydrophone
Answer: Option D
Explanation:
Hygrometer - is used to measure level of humidity,
Hygroscope - shows the changes in atmospheric humidity,
Hypsometer - is used to determine the boiling points of liquids.
2. Device used to measure potential difference between two points in a circuit is ?
- Ammeter
- Galvanometer
- Voltmeter
- None of above
Answer: Option C
3. Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
- Doppler's Effect
- Newton's law of cooling
- Kirchhoff's Law
- Stefan's Law
Answer: Option B
Explanation:
Doppler's Effect - The Doppler effect can be described as the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward shift in frequency for observers from whom the source is receding.
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters.
Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
4. What is unit of Work and Energy ?
- Joule
- kilogram
- amphere
- meter
Answer: Option A
5. Alfred Nobel invented
- X ray
- Diesel Engine
- Dynamite
- Dynamo
Answer: Option C
Explanation:
Alfred Nobel if Sweden invented Dynamite in 1867,
X ray was invented by Wilhelm Roentgen of Germany in 1895,
Diesel Engine was invented by Rudolf Diesel of Germany 1892,
Dynamo was invented by Michael Faraday of England in 1831.