Physics One-liner 4: Free Study Materials PDF » raceinstitute.in

Physics One-liner 4: SSC CGL CHSL MTS Free Study Materials PDF

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General Studies One-liner 4: SSC CGL CHSL MTS Free Study Material PDF

121) Who invented the optical fibre?

Narinder Kapany

122) Freezing Point of Fresh water is 0◦C

123) Lake Freeze in cold countries in winter, leaving the water underneath at?

4◦c

124) Therm is the non-SI Unit of?

Heat

125) Density of water is 1G/CC. it is strictly valid at?

4◦C

126) The Hottest part of Gas Flame is known as?

Non-luminous zone

127) Time period of second pendulum is?

2 sec

128) The device used for measuring the wavelength of X–rays is: Bragg Spectrometer

129) Newton’s 1st law of motion gives the concept of?

Inertia

130) Dimension of Universal Gravitational constant is?

M–1L3T–2

131) Cream gets separated out from milk when it is churned. This is due to?

Centrifugal Force

132) Mass Energy relation is a conclusion of?

Theory of Relativity

133) Rocket acts on Law of conservation of?

Liner Momentum

134) Function of ball bearing in a wheel is?

to convert kinetic friction into rolling friction

135) The first explosion of an atomic device in India was carried out in which state?

Rajasthan

136) Which nontoxic gas helps in formation of enzymes which ripen fruit?

Acetylene

137) Which is used as a material for making protective windows in space probes?

Diamond

138) In nuclear fission, how many percentages of mass is converted into energy?

0.1%

139) Which scientist shared the Nobel Prize in Physics with his son?

William Henry Bragg

140) In which transmission are sound and video signals transmitted simultaneously?

T.V Transmission

141) By whom are the planets are kept in motion in their respective orbits?

Gravitation and centripetal force

142) Wireless communication is reflected to the earth’s surface by the which zone?

Ionosphere

143) Which laser type is used in a laser printer?

Semiconductor laser

144) Why are Clear nights colder than cloudy nights?

Because of Radiation

145) Which Scientists has established the ‘Phylum Annelida’?

Lamarck

146) When water is heated from 0 degree C to 20 degree C, how does its volume change?

Decreases up to 4 degree C and then increases

147) The tendency of liquid drop to contract and why does it occupy minimum area?

Due to surface tension

148) Recoil of a gun is an example of which thing?

Conservation of linear momentum

149) The refractive index of a given piece of transparent quartz is greatest for which light?

Violet light

150) What does a permanent magnet repel?

Paramagnetic substances only

151) If the Kinetic Energy of a body is increased by 300%, how much will its momentum increase?

100 %

152) If there were no atmosphere, what will be the length of the day on the earth?

Decrease

153) Why does the velocity of raindrop attain constant value?

Viscous force exerted by air

154) Activated charcoal is employed to remove colouring matter from pure substance, it works?

Adsorption

155) For television broadcasting, what frequency is employed normally?

30?

300 MHz

156) In which process, a nucleus spontaneously breaks down by emitting radiation?

Radioactive decay

157) Why can Insects move on the surface of water without sinking?

Due to Surface tension of water

158) Mesons are found in which rays?

Cosmic rays

159) How will be the lines of force of a uniform magnetic field?

Parallel to each other

160) Which proper order of seismic waves as they are received at seismograph station?

P-wave, S-wave, L-wave

161) Einstein’s mass energy relation is given by which expression?

E = mc2

162) What is the name of the scientist who stated that matter can be converted into energy?

Einstein

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