Science QA Physics Page: 2
173.In which of the following substance speed of sound is high
Kerosene
Air
Water
Aluminium
174.Which of the following is not a transverse waves
Light waves
Sound waves
Micro waves
Rado waves
175.Which effect of sound is used by Bats
Raman effect
Doppler effect
Tyndal effect
Raleigh effect
176.Which of the following magnet used in telephone
permanent magnet
electromagnet
bar magnet
none
177.Indentify the Principle of magnetic Train
Magnetic repulsive force
Magnetic attractive force
Repulsive force of charge
Attractive force of charge
178.The old name of magnet
Magnetite
Magnet
Iron
Bauxite
179.The intensity of sound causes damage to the ear
180.When temperature increases,speed of sound is
Decreases
Not changed
0
Increases
181.Which microscope is used by watch repairer
Compound microscope
Simple microscope
Telescope
none
182.Primary rainbow is due to
One time total internal reflection two times refraction
Two time total internal reflection two times refraction
Total internal reflection
Refraction
183.Elliptical orbit of electron was proposed by
Prout
Bohr
Sommerfeld
Einstein
185.Identify the principle of hydraulic brake
Hookes law
Stokes law
Pascals law
Bernoullis theorem
186.Which one of the following is used to cure Astigmatism
Cylindrical lens
Concave lens
Bifocal lens
All
187.When amplitude is doubled ,intensity is
Increases two times
Decreases two times
Increases four times
Decreases four times
188.Transverse wave propagated in
Solids
Liquids
Solid,Liquid,Gas
Both Solids and Liquids
189.Which one of the following is wind instrument
Guitar
Tabla
Nadaswaram
Violin
190.Frequency of ultrasonic sound is
20 Hz
20000Hz
16000 Hz
25000 HZ
191.The method of demagnetization
Heating the magnet
Magnet rubbed with another magnet
Breaking the magnet
Cooling the magnet
192.Identify the strong magnet
Para magnet
Ferrro magnet
dia magnet
None
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