# Physics Quiz For ALP Stage-II Exam : 14th January

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Q1. рдХрд┐рд╕ рднреМрддрд┐рдХ рдорд╛рддреНрд░рд╛ рдХреЛ рд╡рд╕реНрддреБ рдХреЗ рд╡реЗрдЧ рдФрд░ рд╕рдВрд╡реЗрдЧ рдХреЗ рдЕрдиреБрдкрд╛рдд рд╕реЗ рджрд░реНрд╢рд╛рдпрд╛ рдЬрд╛рддрд╛ рд╣реИ?
(a) Velocity / рд╡реЗрдЧ
(b) Acceleration / рддреНрд╡рд░рдг
(c) Mass / рджреНрд░рд╡реНрдпрдорд╛рди
(d) Force / рдмрд▓

Show Answer
Ans.(c)
Sol. Momentum is a vector quantity that is the product of Mass and the Velocity of an object or particle.
Momentum = Mass ├Ч Velocity
So, Mass = Momentum/Velocity

Q2. Force is the product of- / рдмрд▓ рдХрд╛ рдЧреБрдгрдирдлрд▓ рд╣реИ-
(a) Mass and velocity / рджреНрд░рд╡реНрдпрдорд╛рди рдФрд░ рд╡реЗрдЧ
(b) Mass and acceleration / рджреНрд░рд╡реНрдпрдорд╛рди рдФрд░ рддреНрд╡рд░рдг
(c) Weight and velocity / рднрд╛рд░ рдФрд░ рд╡реЗрдЧ
(d) Weight and acceleration / рднрд╛рд░ рдФрд░ рддреНрд╡рд░рдг

Show Answer
Ans.(b)
Sol. A force can cause an object with mass to change its velocity i.e., (which includes to start moving from a state of rest) to accelerate.
Force = Mass ├Ч Acceleration = m.a

Q3. Instrument for measuring rainfall is called – / рд╡рд░реНрд╖рд╛ рдорд╛рдкрдиреЗ рд╡рд╛рд▓реЗ рдЙрдкрдХрд░рдг рдХреЛ рдХрд╣рд╛ рдЬрд╛рддрд╛ рд╣реИ-
(a) Lucimeter / рд▓реНрдпреВрд╕реАрдореАрдЯрд░
(b) Galactometer / рдЧреИрд▓реЗрдХреНрдЯреЛрдореАрдЯрд░
(c) Hyetometer / рд╣рд╛рдпрдЯреЛрдореАрдЯрд░
(d) Hygrometer / рд╣рд╛рдЗрдЧреНрд░реЛрдореАрдЯрд░

Show Answer
Ans.(c)
Sol. Hyetometer is the instrument used to measure rainfall.

Q4. Who established the foundations of the quantum theory?  рдкреНрд░рдорд╛рддреНрд░рд╛ рд╕рд┐рджреНрдзрд╛рдВрдд рдХрд┐рд╕рдХреЗ рджреНрд╡рд╛рд░рд╛ рд╕реНрдерд╛рдкрд┐рдд рдХрд┐рдпрд╛ рдЧрдпрд╛?
(a) Max Planck / рдореИрдХреНрд╕ рдкреНрд▓реИрдВрдХ
(b) Mark Nicholas / рдорд╛рд░реНрдХ рдирд┐рдХреЛрд▓рд╕
(c) Albert Einstein / рдЕрд▓реНрдмрд░реНрдЯ рдЖрдЗрдВрд╕реНрдЯреАрди
(d) Alfred Hitchcock / рдЕрд▓реНрдлреНрд░реЗрдб рд╣рд┐рдЪрдХреЙрдХ

Show Answer

Ans.(a)
Sol. Max Planck was a German theoretical physicist, considered to be the initial founder of quantum theory, and one of the most important physicists of the 20th Century.

Q5. If in a motion, the axis of the rotation passes through an object, the motion is called _________.  / рдпрджрд┐ рдХрд┐рд╕реА рдЧрддрд┐ рдореЗрдВ, рдШреВрд░реНрдгрди рдХрд╛ рдЕрдХреНрд╖ рдХрд┐рд╕реА рд╡рд╕реНрддреБ рд╕реЗ рдЧреБрдЬрд░рддрд╛ рд╣реИ, рддреЛ рдЧрддрд┐ рдХреЛ _________ рдХрд╣рд╛ рдЬрд╛рддрд╛ рд╣реИред
(a) Orbital motion / рдХрдХреНрд╖реАрдп рдЧрддрд┐
(b) Circulatory motion / рдкрд░рд┐рд╕рдВрдЪрд░рдг рдЧрддрд┐
(c) Spin motion / рд╕реНрдкрд┐рди рдЧрддрд┐
(d) Oscillatory motion / рджреЛрд▓рдирд╢реАрд▓ рдЧрддрд┐

Show Answer
Ans.(c)
Sol. In physics, spin is the velocity of rotation of something around a particular axis.

Q6. Direct viewing of sun during total solar eclipse causes irreversible damage to eyes. The retinal burn is caused by which one of the following components of the sun rays? /
рдкреВрд░реНрдг рд╕реВрд░реНрдп рдЧреНрд░рд╣рдг рдХреЗ рджреМрд░рд╛рди рд╕реВрд░рдЬ рдХреЛ рд╕реАрдзреЗ рджреЗрдЦрдиреЗ рд╕реЗ рдЖрдБрдЦреЛрдВ рдХреЛ рдЕрдкрд░рд┐рд╡рд░реНрддрдиреАрдп рдХреНрд╖рддрд┐ рд╣реЛрддреА рд╣реИред рд░реЗрдЯрд┐рдирд╛ рдХрд╛ рдЬрд▓рдирд╛, рд╕реВрд░реНрдп рдХреА рдХрд┐рд░рдгреЛрдВ рдХреЗ рдирд┐рдореНрдирд▓рд┐рдЦрд┐рдд рдХрд┐рд╕ рдШрдЯрдХ рдХреЗ рдХрд╛рд░рдг рд╣реЛрддрд╛ рд╣реИ?
(a) Heat / рддрд╛рдк
(b) Rainbow light / рдЗрдиреНрджреНрд░рдзрдиреБрд╖ рдкреНрд░рдХрд╛рд╢
(c) Ultra-violet light / рдкрд░рд╛рдмреИрдВрдЧрдиреА рдкреНрд░рдХрд╛рд╢
(d) Infra-red light / рдЕрд╡рд░рдХреНрдд рдкреНрд░рдХрд╛рд╢

Show Answer
Ans.(c)
Sol. The only time that the sun can be viewed with the naked eye is during a total eclipse when the moon completely covers the disk of the sun. But it is never safe to look at a partial or annular eclipse or the partial phases of a total solar eclipse without proper equipment and techniques. Failure to use proper observing method may result in permanent eye damage or severe visual loss caused by the ultraviolet (UV) radiations of a higher wavelength.

Q7. Which among the following waves is used for communication by artificial satellites? / рдХреГрддреНрд░рд┐рдо рдЙрдкрдЧреНрд░рд╣реЛрдВ рджреНрд╡рд╛рд░рд╛ рд╕рдВрдЪрд╛рд░ рдХреЗ рд▓рд┐рдП рдирд┐рдореНрдирд▓рд┐рдЦрд┐рдд рдореЗрдВ рд╕реЗ рдХрд┐рд╕ рддрд░рдВрдЧ рдХрд╛ рдкреНрд░рдпреЛрдЧ рдХрд┐рдпрд╛ рдЬрд╛рддрд╛ рд╣реИ?
(a) Micro waves / рд╕реВрдХреНрд╖реНрдорддрд░рдВрдЧ
(b) Radio waves / рд░реЗрдбрд┐рдпреЛ рддрд░рдВрдЧ
(c) A. M. / рдП.рдПрдо.
(d) Frequency of 1016 series / 1016 рд╢реНрд░реГрдВрдЦрд▓рд╛ рдХреА рдЖрд╡реГрддреНрддрд┐
Show Answer
Ans.(a)
Sol. For fixed (point-to-point) services, communications satellites provide a microwave radio relay technology complementary to that of communication cables. They are also used for mobile applications such as communications to ships, vehicles, planes and hand-held terminals, and for TV and radio broadcasting. Microwave technology is extensively used for point-to-point telecommunications (i.e., non broadcast uses). Microwaves are especially suitable for this use since they are more easily focused into narrow beams than radio waves, and also their comparatively higher frequencies allow broad bandwidth and high data flow.

Q8. Photosynthesis using the invisible part of the sunlight is done by some- / рдХреБрдЫ ______ рджреНрд╡рд╛рд░рд╛ рд╕реВрд░реНрдп рдХреЗ рдкреНрд░рдХрд╛рд╢ рдХреЗ рдЕрджреГрд╢реНрдп рднрд╛рдЧ рдХрд╛ рдЙрдкрдпреЛрдЧ рдкреНрд░рдХрд╛рд╢ рд╕рдВрд╢реНрд▓реЗрд╖рдг рджреНрд╡рд╛рд░рд╛ рдХрд┐рдпрд╛ рдЬрд╛рддрд╛ рд╣реИред
(a) Trees / рд╡реГрдХреНрд╖
(b) Algae / рд╢реИрд╡рд╛рд▓
(c) Bacteria / рдЬреАрд╡рд╛рдгреБ
(d) Fungi / рдХрд╡рдХ

Show Answer
Ans.(c)
Sol. The bacteria which are found at 400-8000 ft into the deep sea, for example green Sulphur bacteria, uses infrared radiations for photosynthesis to produce energy.

Q9. Red light signal is used as a danger signal because- / рд░реЗрдб рд▓рд╛рдЗрдЯ рд╕рд┐рдЧреНрдирд▓ рдХрд╛ рдкреНрд░рдпреЛрдЧ рдЦрддрд░реЗ рдХреЗ рд╕рдВрдХреЗрдд рдХреЗ рд░реВрдк рдореЗрдВ рдХрд┐рдпрд╛ рдЬрд╛рддрд╛ рд╣реИ рдХреНрдпреЛрдВрдХрд┐-
(a) Red light is scattered least / рд░реЗрдб рд▓рд╛рдЗрдЯ рдХрдо рдлреИрд▓рддреА рд╣реИ
(b) This is comfortable for eyes / рдЖрдБрдЦреЛрдВ рдХреЗ рд▓рд┐рдП рдЖрд░рд╛рдорджрд╛рдпрдХ рд╣реИ
(c) It produces least chemical reaction / рдпрд╣ рдиреНрдпреВрдирддрдо рд░рд╛рд╕рд╛рдпрдирд┐рдХ рдкреНрд░рддрд┐рдХреНрд░рд┐рдпрд╛ рдЙрддреНрдкрдиреНрди рдХрд░рддреА рд╣реИ
(d) It is least absorbed in air / рд╡рд╣ рд╡рд╛рдпреБ рдореЗрдВ рдХрдо рдЕрд╡рд╢реЛрд╖рд┐рдд рд╣реЛрддрд╛ рд╣реИ

Show Answer
Ans.(a)
Sol. The red light signal is used as a danger signal because it has the highest wavelength and scattered least.

Q10. Which one of the following colours is seen in the middle of a Rainbow? / рдирд┐рдореНрдирд▓рд┐рдЦрд┐рдд рдореЗрдВ рд╕реЗ рдХреМрди рд╕рд╛ рд░рдВрдЧ рдЗрдВрджреНрд░рдзрдиреБрд╖ рдХреЗ рдордзреНрдп рдореЗрдВ рджреЗрдЦрд╛ рдЬрд╛рддрд╛ рд╣реИ?
(a) Blue / рдиреАрд▓рд╛
(b) Green / рд╣рд░рд╛
(c) Red / рд▓рд╛рд▓
(d) Yellow / рдкреАрд▓рд╛

Show Answer
Ans.(b)
Sol. The correct order of colors of the rainbow is Red, Orange, Yellow, Green, Blue, Indigo and Violet. Thus it is clear that тАШGreenтАЩ Color is seen in the middle of Rainbow (VIBGYOR).

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