Q. 46. Which vaccine was the first DNA vaccine approved for human use in India?
ZyCoV-D
Covaxin
Covishield
Sputnik V
Answer:
(A) ZyCoV-D
Explanation:
Developed by Zydus Cadila, ZyCoV-D became the world’s first and India’s first plasmid DNA vaccine approved for emergency use against COVID-19.
Q. 47. Which of the following is a non-ionizing radiation?
X-rays
Gamma rays
UV-C rays
Infrared rays
Answer:
(D) Infrared rays
Explanation:
Non-ionizing radiation does not have enough energy to remove an electron from an atom or molecule. Infrared rays, visible light, and radio waves are non-ionizing, whereas X-rays and Gamma rays are ionizing.
Q. 48. A device used to store electric charge is
Diode
Inductor
Capacitor
Rheostat
Answer:
(C) Capacitor
Explanation:
A capacitor is an electronic component that stores electrical energy in an electric field by accumulating electric charge on two closely spaced surfaces insulated from each other.
Q. 49. Which wave is used in the Iron-Dome system?
Sound waves
Infrared waves
Microwaves
Gamma rays
Answer:
(C) Microwaves
Explanation:
Israel’s Iron Dome system relies heavily on advanced active electronically scanned array (AESA) radar systems to track incoming threats. Radar systems operate using radio waves and microwaves.
Q. 50. The speed of light is maximum in
Water
Air
Glass
Vacuum
Answer:
(D) Vacuum
Explanation:
Light travels at its maximum possible speed (approximately 299,792 kilometers per second) in a perfect vacuum, where there is no matter to scatter or slow down the photons.
