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Practice MCQ Questions and answers on Physics-GK

Learn and practice General Knowledge questions and answers on Physics with very easy and understandable explanations. GK questions are very helpful different type of competitive exams. Page-4 section-5

Each section contains 100 MCQs on Physics .
31
Hydraulic machines work under the Principle of :
Discuss
Answer & Solution
Answer: Option C
Solution:
The hydraulic system works on the principle of Pascal's law which says that the pressure in an enclosed fluid is uniform in all the directions.
32
Alcohol is more volatile than water because ________ is lower than water.
Discuss
Answer & Solution
Answer: Option A
Solution:
Alcohol is more volatile than water because it boiling point is lower than water.
33
A manometer is used to measure
Discuss
Answer & Solution
Answer: Option B
Solution:
Manometers are precision instruments that are used to measure pressure, which is the force exerted by a gas or liquid per unit surface area owing to the effects of the weight of that gas or liquid from gravity.
34
Anemometer is used to measure
Discuss
Answer & Solution
Answer: Option B
Solution:
An anemometer is an instrument that measures wind speed and wind pressure. Anemometers are important tools for meteorologists, who study weather patterns. They are also important to the work of physicists, who study the way air moves.
35
The instrument used to measure the speed of the wind is
Discuss
Answer & Solution
Answer: Option B
Solution:
The instrument used to measure the speed of the wind is anemometer.
36
The sudden fall of atmospheric pressure indicates
Discuss
Answer & Solution
Answer: Option B
Solution:
A slowly rising atmospheric pressure, over a week or two, typically indicates settled weather that will last a long time. A sudden drop in atmospheric pressure over a few hours often forecasts an approaching storm, with heavy rain and strong winds.
37
Hydraulic brakes in automobile work on
Discuss
Answer & Solution
Answer: Option B
Solution:
Hydraulic brakes in automobile work on Pascal's principle.
38
When the barometer reading dips suddenly, it is an indication of
Discuss
Answer & Solution
Answer: Option C
Solution:
When the barometer reading dips suddenly, it is an indication of storm.
39
A storm is predicted if atmospheric pressure
Discuss
Answer & Solution
Answer: Option C
Solution:
A storm is predicted if atmospheric pressure falls suddenly.
40
On which principle does the hydraulic lift works?
Discuss
Answer & Solution
Answer: Option B
Solution:
Hydraulic lift works on the principle of Pascal's law.