General Science Question and Answers:-For Railway/SSC/Clerk /Junior Accountant/Postal
Circle
Q. Earth rotation can be exhibited by
Ans.
Faucoult pendulum
Q. Velocity of light is constant but
measurable (3*10^8 m/sec) Quantity and therefore has error of 3.0 per part of.
Ans.Millions
Q. Cesium atomic clock at the Boulder Laboratories
of the National Bureau of standards measures time intervals to an accuracy equivalent
to the loss of less than I see in the __________ years.
Ans.3000
Q .An automatic standard of length was
adopted by International Bureau of standard as isotope of
Ans.
Krypton
Q. The best measured value of radius of
the Sun is
Ans.
6.9*10^8 meters
Q. The smallest Hydrogen atoms
size(diameter)is
Ans.
10^-10 meters
Q. The relationship between the measured
quantities, that is, the laws of Physics, will be the same for all observes in
_____________Frame of reference.
Ans.
inertial
Q. The estimated age of our Planet, the
Earth, is
Ans.
1.3*10^17 seconds
Q. If someone told you that everything
had shrunk to half its former value over right, you would refute this statement
by standard of
Ans.
Length
Q. Most of time the distinction between
vector quantity and scalar quantity is made by
Ans.
Geometry
Q. Which set of quantities is the most
appropriate and similar?
Ans.
(Complex quantity, Vector and Tensor)
Q. Instantaneous velocity may have
range.
Ans.
v=0 to v=c(velocity of light)
Q. Which velocity is the independent?
Ans.
Average
Q. Acceleration is zero for the
following (one of them) velocity.
Ans.
Average
Q. Impulse is constant for the following
(one of them) velocity.
Ans.
Average
Q. The external force is zero for the
following (one of them) velocity.
Ans.
Average
Q. Which speed is registered by the speedometer
of an automobile?
Ans.
instantaneous
Q. An engine driver moves train at speed
v1 and sees another train at distance ‘d’ on same track moving with slower
speed v2, Driver puts on the brakes and gives a constant acceleration ‘a’ to
save the collision, then condition for no collision is.
Ans.
d>(v1-v2)^2/2a
Q. To win gold in Olympic for javelin
throw, the angle of project should be.
Ans.
45
Q.A sideways force experienced by a
passenger in a car moving speedily in curved path, is called
Ans.
Centrifugal force
Q. “Re-Action is equal and opposite to
Action” statement is true in.
Ans.
Inertial frame only
Q. The mass of the Sun is.
Ans.
2.0*10^30 kg
Q. One pound-force is equivalent to Newton’s.
Ans.
4.45 N
Q. Our inertial mass is given by
Ans.
m=F/a
Q. Mass in terms of force, time and
velocity is
Ans.
m=FT/v
Q. We are able to write, speak properly
because of the
Ans.
Friction
Q. The train roadbeds and highways are
banked on curves because of the
Ans.
Centrifugal force
Q. A passengers in front seat of a car finds himself sliding towards the door
as the driver makes a sudden left him turn. This happens because of the
Ans.
Centrifugal force
Q. A passenger in the seat of a car
falls front side when drier applies sudden brakes because of the
Ans.
Deceleration
Q. A coin is put on a phonograph turn
table and motor is started, but before the final speed of rotation is reached,
the coin flies of because of
Ans.
Centrifugal force
Q. The weight of a man is minimum when
measured at
Ans.
Space
Q. The weight of a man is maximum when
measured at
Ans.
N-pole of the Earth
Q. If you want to stop the car in the
shortest distance on an Ice or ice road, then you should apply brakes.
Ans.
Pumped
Q. The range of your car’s headlight for
safe driving speed at night should be compared to skidding distance of a car
after brakes application.
Ans.
Large
Q .If we throw a ball up in open jeep
moving with quite good speed on horizontal and straight road, then ball will
fall.
Ans.
Inside jeep
Q. If we throw a ball up in open jeep
moving with quite good speed on round horizontal road, then ball will fall
Ans.
Side of Jeep
Q. Atom bomb is based upon famous
formula.
Ans.
E=mc^2
Q. Mountain roads rarely go straight up
the slope but wind up gradually, because of road friction less than
Ans.
Down Horizontal height
Q.A boy cycling on only or muddy road
will slip towards his left side always because of
Ans.
Angular momentum
Q. The melting of the polar icecaps was
cited as a possible cause of the variation in the Earth’s time of rotation
because
Ans.
Moment of inertia
Q. Many great rivers flow towards the
Equator of the Earth because of
Ans.
Centrifugal effect
Q. A man turns on a rotating table with
an angular speed and he is holding two equal weight at Stretched out arms.
Without leaving weights he drops his arms then rotating table would?
Ans.
fast angular speed
Q. A ladders are at rest with its upper
and against a wall and the lower end on the ground; it is more likely to slip
when man stands on it at?
Ans.
Top
Q. For learning tower of Pissa, Centre
of gravity and Centre of mass?
Ans.
Do not line up vertically
Q.A circular motion can be resolved into
Simple harmonic motion?
Ans.
Two
Q. If the force of gravity acts on all
bodies in proportion to their masses which body either heavy or light weighted
will move fast to touch ground if
released from h height?
Ans.
Both
Q. One clock is based on pendulum and another
is digital and both at taken to mars, which clock will keen time of earth?
Ans.
Digital
Q. Inside a space ship you encounter
difficulties in walking, jumping and drinking due to _
Ans.
Free fail
Q. A ice cube is floating in a glass of
water and on complete melting of ice cube, the level of water in glass
would______
Ans.
Same
Q. Two similar bottle one with lid and
second is without lid are immersed in bucket full of water with neck down, which will sink with least efforts?
Ans.
Bottle with lid
Q. A big ship will be stable in ocean if
its centers of gravity and buoyancy___________
Ans.
Coincide
Q. If a U- tube contains water are
rotated about a vertical axis through the center of one limb, and then water in
one limb at center would_________
Ans.
Decrease
Q. Liquid will flow faster and smoothly from a sealed can when can is
Ans.
Hole is made in can for upside down
Q.A passing motor boats creates a wave
that causes to wash shore. As time goes
on, the period of the arriving waves grows shorter and shorter, because of
increase in
Ans.
Wavelength
Q. In Nepal earthquake area with high
damage alternated with areas of low damage.
I t was due to earthquake waves of nature as
Ans.
Plane Longitudinal
Q. Sound waves does not travel at moon
due to
Ans.
No atmosphere
Q. Bells frequently sound less pleasant
than pianos or violins
Ans.
Odd harmonics of lemda/4
Q. In rainy season, Sound of thunder is
delayed by lightening because of the fact that sound travels ____then light waves
Ans.
Slower
Q. At what temperature do the Fahrenheit
and Celsius coincide?
Ans.
-40 F
Q. Why does a glass sometimes break if you quickly pour boiling water into it?
Ans.
Inside glass expands then outside
Q.A strip of CU id riveted to a strip of
Al. The two metals are then heated, then
Ans.
bends towards Al
Q .Which has the higher density, dry air
of humid air?
Ans.
Humid air
Q. In winter metal is more cooler than wood
because more if the_________
Ans.
conductivity
Q. Pipes are bursted in winter due to
water frozen, why?
Ans.
less density
Q. Which type of idea gas will have the
large value Cp-Cv ?
Ans.
Polyatomic
Q. Why must heat energy be supplied to
melt ice without rise in temperature?
Ans.
Latent heat
Q. Can a static magnetic field do
positive work on a charged particle?
Ans.
No
Q. Does an electric motor have a higher effective resistsence when it is stopped or when it is spinning?
Ans.
When stopped
Q. Which color of light is least
absorbed by plants?
Ans.
Green
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