851. Which among the following strictly works on the principle of dipole movement of the water molecules?
A. Refrigerator
B. Microwave Oven
C. Air Conditioner
D. Electric Geyser
✅ The correct answer is option B.
SSC
852. Which among the following is a Beyond-visual-range air-to-air missile
A. Agni
B. Prithvi
C. Astra
D. Nag
✅ The correct answer is option C.
853. Which among the following waves are most commonly used in the Night Vision Devices?
A. Microwaves
B. Infra Red Waves
C. Ultra Violet Waves
D. Radio Waves
✅ The correct answer is option B.
854. Which among the following is the most acceptable range of LEO (Low Earth orbit)?
A. 350 – 2,600 kms
B. 200-2000 kms
C. 160 – 2,000 kms
D. 160-1600 kms
✅ The correct answer is option C.
855. Which among the following waves are used in the gemstone industry to change white topaz into blue topaz?
A. X-Rays
B. Gamma Rays
C. Alpha Radiation
D. Beta Radiation
✅ The correct answer is option B.
856. Fermi-Kurie plot is used for the study of which of the following?
A. Alpha Decay
B. Beta Decay
C. Internal Conversion
D. Cluster Decay
✅ The correct answer is option B.
857. Who among the following coined the term ―cosmic rays‖ ?
A. Henri Becquerel
B. Theodor Wulf
C. Robert Millikan
D. Bruno Rossi
✅ The correct answer is option C.
858. What do we call the part of the ―DTH Satellite dish‖ that converts the signals from electromagnetic or radio waves to electrical signals ?
A. Orthomode transducer (OMT)
B. Low-noise block converter (LNB)
C. Block upconverter (BUC)
D. Parabolic Dish
✅ The correct answer is option B.
859. By which of the following process some stars which are of the size of Sun or smaller convert hydrogen to helium?
A. Triple-alpha process
B. Proton Proton Chain Reaction
C. CNO Cycle
D. R process
✅ The correct answer is option B.
860. The following is measured in tonne of oil equivalent (toe) ?
A. Volume of Oil
B. Energy released by burning of oil
C. Demand of Crude oil at a point of time
D. Oil production capacity of a country
✅ The correct answer is option B.