sound waves are example of
transverse waves
medium free waves
diagonal waves
longitudinal waves

we cant hear......... type of waves
infrasonic
ultrasonic
both
hyposonic
tachosonic

radar gun is used by
military
police
traffic police
NASA

who told that light is made of corpusles/particles
huygein
maxwell
newton
einstein

light, which is wrong
dual nature
composite nature
chromatic nature(mono, di,tri.........)
transverse wave
light speed can be broken
only visible portion of EM spectrum
reflected by lens

red colour, what is wrong
shortest frequency
longest wavelength
most bent in rainbow

for our convenience we suppose that light has rectilinear(straight) propagation
true
false

spherical lens has same effect on eye as cylindrical lens(of same power)
false
true

infinite resistance, what type of circuit it is
open
close
short

short circuit, which is wrong
abnormal high resistance connection between two nodes of an electrical circuit
overcurrent
can cause circuit damage

stress and pressure, what is not similiar
force per unit area
same formula
strain

aneroid barometer is used at
home
lab
mountains
sea level

standard value of atm pressure, which is wrong value
1 atm
760torr of Hg
14.7 psi
19.8 calories
101300N/m2
1 lac pascals
80 tons

which is not property of Hg
high MP
low BP
sticking to walls
linear expansion with increase to temperatuer

volume of gas is directly dependant on temperature(keeping same pressure etc)
charles law
grams law
boyles law
dalton law

which is applicable in breathing
dalton law
grahms law
pressure law
avogadros law

total pressure inside tyre is always
28psi
14 psi
42.7psi

which science is said to be mother of all sciences
philosophy
life/natural sciences
physics
matematics

shadow can be of green color
true
false

material which produce shadow is
transparent
translucent
opaque
heat resistant
light resistant

reversible property of matter , is due to
chemical change
physical change

which of following can exist independently in nature
element
atom
molecule
compound
ionn
radical
all

metal, which is wrong
gain electron
good conductor
ductile
have lusture
oxidant

mixture, which is wrong
impure substance
composition is fixed
have no sharp melting point and boiling point

ferrum is latin name for
iron
fold
silver
mercury

difference of 220 is between
live and neutral
live and earth
earth and neutral

which is used for safety purpose( electricity wires)
live
neutral
earth

neutarl wire is connected to eart about every
1km
100 feet
100 m
10 yards

how a magnet can be demagnetized
single touch method
double touch method
using AC current

Beats refer to (sound)
periodic alternation between max and min sharpeness
.................................................. ...... loudness
.................................................. ....... intensity
.................................................. ....... quality

special theory of relativity, which is wrong
1905
concerned only with inertial frame of reference
it covers accelerated motion
none

a black body radiates mainly infra red radiations at the temperature of
273.16k
-273.16k
800k
ok
it does not radiate

a good example of back body on earth (only 2 % reflection)
coal
oven
carbon
lampbalck

photon, which is wrong
particle
no charge
no mass
no antiparticle
energy=mc2
does not daecay
finite lifetime

element become radioactive , having atomic number greater than
82
100
235U
plutonium

frost formed if
dew point<0C
dew point >0C
dewpoint > or equal to 100C
dewpoint< 100C

........is not an example of intensive properties of system
density
volume
temperature
pressure

ammonia is synthesized through
regrigration process
contact process
herbes process

there is an acid generally used in ink, which is this acid
acetic
valeric
formic
tanic

soft coal is
peat
lignite
bitumin
anthracite

most% of carbon is in
peat
lignite
bitumin
antharacite