Everyday Science — All MCQs
2717 questions available
Q141.If output voltage is greater than input voltage, then transformer is:
Correct Answer: A
A transformer where output voltage exceeds input voltage is called a step-up transformer.
Q142.The voltage signal which is generated by microphone is called:
Correct Answer: B
A microphone converts sound into a continuously varying (analogue) electrical signal.
Q143.Third most common gas that is found in the air we breathe is called:
Correct Answer: C
After nitrogen and oxygen, argon is the third most abundant gas in the air we breathe.
Q144.Electromagnetic radiation with maximum wavelength is:
Correct Answer: B
Among electromagnetic radiations, radio waves have the longest (maximum) wavelength.
Q145.The most dangerous type of radiation is:
Correct Answer: C
Gamma radiation has the highest energy and penetrating power, making it the most dangerous type of radiation.
Q146.The solar energy is radiated in the form of:
Correct Answer: A
Solar energy travels to Earth as electromagnetic waves (including visible light and infrared).
Q147.The study of human body cells is called:
Correct Answer: B
Cytology is the branch of biology that studies the structure and function of cells.
Q148.Excessive bleeding during an injury is a deficiency of:
Correct Answer: B
Vitamin K is essential for blood clotting; its deficiency causes excessive bleeding.
Q149.Which fuel is used in gas welding?
Correct Answer: A
Acetylene gas, burned with oxygen, is commonly used as fuel in gas (oxy-acetylene) welding.
Q150.Which of the following can be classified as renewable energy source?
Correct Answer: D
Geothermal, tidal, and biomass energy are all renewable energy sources.
Q151.How do scientists know that the Earth's core is made up of metal?
Correct Answer: A
The Earth's average density is much higher than the density of its surface (crustal) rocks, indicating a dense metallic core.
Q152.Maintenance of soil fertility without addition of extra nutrition is due to:
Correct Answer: C
Microbial activity breaks down organic matter and recycles nutrients, helping maintain soil fertility naturally.
Q153.Nanocomposite materials are useful in food industry as they prevent packaged food from damage due to:
Correct Answer: D
Nanocomposite packaging materials create barriers against oxygen, carbon dioxide, and moisture, all of which can damage food.
Q154.Which of the following statement is true?
Correct Answer: D
Fat-soluble vitamins can be stored in body tissues, unlike water-soluble vitamins which are not stored and must be replenished regularly; excess fat-soluble vitamin absorption can also occur, making all listed statements true.
Q155.Third most common gas that is found in the air to breath is:
Correct Answer: C
Correct answer is C: Argon
Q156.98 percent carbon in Coke, Rest is?
Correct Answer: B
Q157.The Unit of Charge Is The
Correct Answer: A
Q158.which is used for brain activity
Correct Answer: B
Q159.Who invented the railway engine
Correct Answer: D
Q160.Brightest planet:
Correct Answer: B