101. A person can swim comfortable in water. This is due to: Answer: Newton's third law
102. A type of stone that can float on water:
Answer: Pumice stone
103. An idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence:
Answer: Black body
104. Brilliance of diamond is due to:
Answer: Total internal refecion
105. Colour of a star depends upon its:
Answer: Temperature
106. Endoscopy, a technique used to explore the stomoach or other inner parts of the body, is based on the principle of:
Answer: Total Internal Reflection
107. GSM stands for:
Answer: Global System of Mobile Communications
108. How many carats is pure gold?
Answer: 24 carats
109. Hydrogen bomb is based on the principle of:
Answer: Uncontrolled fusion reaction .
110. Hydrogen spectrum was first explained by:
Answer: Niels Bohr
111. If the electrical resistance of a typical substance suddenly drops to zero, then the substance is called:
Answer: Super conductor
112. If there is no atmosphere the length of the day would:
Answer: Decrease
113. In which date. Įndia's Chandrayan was launched: -
Answer: 2008 October 2212
114. Kaleidoscope is based on the principle of:
Answer: Multiple Reflection
115. Magnetic field of electric current was discovered by:
Answer: Oesterd '
116. Magnetism at the centre of a bar magnet is:
Answer: Zero
117. Materials for rain-proof coats and tents owe their water proof properties to:
Answer: Surface tension :-
118. Name the inventor of Black Box Flight recorder:
Answer: David Warren
119. Noise is measured in:
Answer: Decibel
120. Nuclear sizes are expressed in a unit called
Answer: "Fermi"
121. Ponds look shallow because of:
Answer: Refraction
122. Short-sight in human eye can be rectified by:
Answer: Concave lens
123. Sound frequency below 20 Hz is called:
Answer: Infrasonic
124. The Automated Teller Machine (ATM) was invented by:
Answer: John Shepard Barren
125. The density of air is:
Answer: 1.3 kg /cubic metre
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