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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-2 section-3

Each section contains 100 MCQs on Physics .
11
Lightning heats the surrounding air to
Discuss
Answer & Solution
Answer: Option C
Solution:
Lightning heats the surrounding air to 30000 deg Cent.
12
Which of the following is not an intrusive igneous body?
Discuss
Answer & Solution
Answer: Option C
Solution:
Batholith is the biggest of the intrusive igneous rocks. Stope is not an intrusive igneous body. It is related to mining.
13
The instrument for measuring intensity of earthquakes is called
Discuss
Answer & Solution
Answer: Option D
Solution:
The instrument for measuring intensity of earthquakes is called Seismograph.
14
An instrument that records earthquakes is
Discuss
Answer & Solution
Answer: Option D
Solution:
An instrument that records earthquakes is Seismograph.
15
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor
Discuss
Answer & Solution
Answer: Option D
Solution:
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor should be made of a good conductor like copper with sharp-pointed edges.
16
The number of waves per second in a sound is called ________ of that sound.
Discuss
Answer & Solution
Answer: Option B
Solution:
The number of waves per second in a sound is called frequency of that sound.
17
Sound waves do not show the phenomenon of
Discuss
Answer & Solution
Answer: Option D
Solution:
As sound waves are longitudinal waves, they don't exhibit Polarization phenomenon, which is exhibited by the transverse wave only.
18
Speed of sound is maximum in which among the following?
Discuss
Answer & Solution
Answer: Option D
Solution:
We know that, in solids all the particles are packed together and hence sound can travel from one to one very fast. Hence, speed of sound is maximum in solids and decreases from solids to liquids and liquids to gases. Sound can't travel through vacuum.
19
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
Discuss
Answer & Solution
Answer: Option D
Solution:
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because there is no air or any other gas in the bell jar.
20
What is the full form of "RADAR" ?
Discuss
Answer & Solution
Answer: Option A
Solution:
Radio Detecting and Ranging is the full form of "RADAR".