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Recent questions tagged physics
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The horizontal components of the of the earth field at the place of 0.22 G
physics
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Sep 20, 2017
by
harishmanikpuri97
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answer
A typical solar cell can produce electricity equal to
cbsc
class 10
olympiad
science
physics
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Sep 20, 2017
by
priyanka.c
1
answer
Which of these is not a green house gas?
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class 10
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Sep 20, 2017
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priyanka.c
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_________ rods play an important roles as an absorbant in a nuclear reactor
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Sep 20, 2017
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priyanka.c
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To convert ocean thermal energy into electricity, it is necessary that a difference of more than _____ between the surface waters and water depths of 1000m is required.
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class 10
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Sep 20, 2017
by
priyanka.c
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An alternating current has a frequency has a frequency of 50Hz. How many times does it change its direction in one direction?
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class 10
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Sep 20, 2017
by
priyanka.c
1
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If a conductor moves ______ to a magnetic field, an induced emf appears across its ends.
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class 10
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Sep 20, 2017
by
priyanka.c
1
answer
A moving charge experiences a force in a magnetic field except when it is moving _____ to the magnetic field
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class 10
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Sep 20, 2017
by
priyanka.c
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If the length of a conductor is resistance R is doubled, what will be its new resistance?
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class 10
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science
physics
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Sep 20, 2017
by
priyanka.c
1
answer
What is the electric potential of a charge at infinity?
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class 10
olympiad
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physics
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Sep 20, 2017
by
priyanka.c
1
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Read the passage below and answer the following question <br><br> The phenomenon of splitting of white light into its component colours on passing through a refracting medium such a glass prism is called dispersion of light. The pattern obtained on the screen is called spectrum. <br><br> Cause for dispersion of light : Light rays of different colours travel with the same speed in vaccum. But in a refracting media like glss, water, etc; lights of different colours travel with different speeds. The speed of violet colour is the least while the speed of the red is the largest in glass. Hence the violet colour is deviated the most and the red colour the least. The other colur indigo, blue, green, yellow and orange are deviated by intermediate angles. <br><br> Question : The refractive index for violet is what is the electric charge
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class 10
olympiad
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physics
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asked
Sep 20, 2017
by
priyanka.c
1
answer
The moment of inertia of a thin circular disc about one of its diameter is
physics
asked
Sep 20, 2017
by
ajha8491
1
answer
A partical of mass m moving speed u hits a wedge of mass M of shown in figu
physics
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Sep 20, 2017
by
arpitjha361
0
answers
a monochromatic ray of light passing through an equilateral prism of R I
physics
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Sep 19, 2017
by
siddhanttambe42
0
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why a positive ion can used rather than a negative ion
physics
asked
Sep 19, 2017
by
gsmodern2011
1
answer
Read the passage and answer the question given below <br><br> The phenomenon of splitting of which light into its component colour on passing through a refraction medium such as a glass prism is called dispersion of light. The pattern obtained on the screen is called spectrum. <br><br> Cause for dispersion of light: Light rays of different colours travel with the same speed in vaccum. But in a refracting media like glass, water etc; light of different colours travel with different speeds. The speed of violet colour is the least while the speed of the red is the largest in glass. Hence the violet colour is deviate the most and the red colour the least. The other colours indigo, blue, green, yellow and orange are deviated by intermediate angle. <br><br> Question : Dispersion of light through a medium is due to
cbsc
class 10
olympiad
science
physics
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Sep 19, 2017
by
priyanka.c
0
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Why is the spokes of a rapidly rotating wheel cannot be distinguished?
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class 10
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physics
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asked
Sep 19, 2017
by
priyanka.c
1
answer
The power of a lens is -2.0D. What will be its focal length?
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class 10
olympiad
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physics
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asked
Sep 19, 2017
by
priyanka.c
1
answer
Set up an arrangement of three point charges +q , +2q , xq seprated by equa
physics
asked
Sep 19, 2017
by
gurindersinghjc246962m
1
answer
What is coordination number in crystaline state?
physics
asked
Sep 19, 2017
by
mukundw26
1
answer
An incident ray makes an angle of $25^{\circ}$ with the surface of a plane mirror. What will be the angle of reflection?
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class 10
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Sep 19, 2017
by
priyanka.c
1
answer
What is the minimum size of a plane mirror which can enable a man to see his full image?
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class 10
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physics
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asked
Sep 19, 2017
by
priyanka.c
1
answer
Which of the following are not responsible for acid rain?
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class 10
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physics
t6
asked
Sep 19, 2017
by
priyanka.c
1
answer
The particles which causes fission of U-235 atom are
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physics
t6
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Sep 19, 2017
by
priyanka.c
1
answer
Magnetic fields do not interact with
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physics
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Sep 19, 2017
by
priyanka.c
1
answer
The radiations from the sun which is felt by us in the form of heat is
cbsc
class 10
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Sep 19, 2017
by
priyanka.c
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A bar magnet falls vertically through a magnet. Its acceleration is
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class 10
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Sep 19, 2017
by
priyanka.c
1
answer
The rule which determines the polarity of a circular current loop is
cbsc
class 10
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Sep 19, 2017
by
priyanka.c
1
answer
The scientist who first suggested that a magnet should exert force on a current carrying conductor was
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class 10
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Sep 19, 2017
by
priyanka.c
1
answer
Read the passage carefully and answer the question given below <br><br> Electric fuse: <br> It is a safety device used to protect electrical appliances from strong currents. A fuse wire must have high resistivity and low melting point. It is usually made from an alloy of tin and lead. It is put in series with the live wire of the circuit. The electric installations are thus saved from getting damaged. <br><br> Thus fuses used for domestic purpose are rated 1A, 2A, 3A, 5A, 10A, etc. For an electric iron that consumes 1KW electric power when operated at 220V, a current of (1000/220) A that is 4.54A will flow in the circuit. In this case a 5A fuse must be used. <br><br> Question : A toaster is marked 1500W/220V. What should be the rating to fuse used across this appliance
cbsc
class 10
olympiad
science
physics
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asked
Sep 19, 2017
by
priyanka.c
1
answer
Read the passage carefully and answer the question given below <br><br> Electric fuse : <br> It is a safety device used to protect electrical appliances from strong currents. A fuse wire must have high resistivity and low melting point. It is usually made from an alloy of tin and lead. It is put in series with the live wire of the circuit. When the current exceeds the safety limit, the fuse wire melts and breaks the circuit. The electric installations are thus saved from getting damaged.<br><br> The fuses used for domestic purposes are rated 1A, 2A, 3A, 5A, 10A etc. For an electric iron that consumes 1KW electric power when operated at 220V, a current of (1000/220). A that is 4.54 A will flow in the circuit. In this case a 5A fuse must be used . <br><br> Question : Fuse wire connected in circuits work under the principle of
cbsc
class 10
olympiad
science
physics
t6
asked
Sep 19, 2017
by
priyanka.c
1
answer
A point charge Q is placed at the corner of a square of side a, then find t
physics
asked
Sep 19, 2017
by
jaishree592000
1
answer
A block having mass m and charge –q is resting on a frictionless plane at
physics
asked
Sep 19, 2017
by
jaishree592000
1
answer
6. Three resistances of 2Ω each are connected to form a triangle. The resistance between any two terminal is
cbsc
class 10
olympiad
science
physics
t6
asked
Sep 19, 2017
by
priyanka.c
1
answer
On what principle does cinematography work?
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class 10
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Sep 19, 2017
by
priyanka.c
1
answer
One kilo watt hour is equal to _______J
cbsc
class 10
olympiad
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physics
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Sep 19, 2017
by
priyanka.c
1
answer
What will be the angle of deviation of a ray if it passes through its optic centre?
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class 10
olympiad
science
physics
t6
asked
Sep 19, 2017
by
priyanka.c
1
answer
Which of the following statement are incorrect?
cbsc
class 10
olympiad
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physics
t6
asked
Sep 19, 2017
by
priyanka.c
1
answer
1. Red light of wavelength $750 nm$ enters a glass plate of refractive index $1.5$. If the velocity of light in vacuum is $3 \times 108 m/s$, then its frequency is
cbsc
class 10
olympiad
science
physics
t6
asked
Sep 19, 2017
by
priyanka.c
1
answer
A train starting from rest acquires a speed v with uniform acceleration Alp
physics
asked
Sep 18, 2017
by
advmbsharma
1
answer
The measure mass and volume of a body at 22.42 gram and 4.7 CM respectively
physics
asked
Sep 18, 2017
by
shreyasumankota
1
answer
A ball is projected horizontally from a tower with initial velocity 4m/ s a
physics
asked
Sep 18, 2017
by
merin.k.geo94
0
answers
a ship travelling due north with a speed of 12km/hr relative to the water.
physics
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Sep 18, 2017
by
onwubuyadavid
0
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A disc of mass m and radius R placed on a rough plank of mass M which in t
physics
asked
Sep 18, 2017
by
sonugeosharma
1
answer
The fission products obtained after the fission of $U_{235}$ is
cbsc
class 10
olympiad
science
physics
t2
asked
Sep 18, 2017
by
priyanka.c
1
answer
One Mev of energy is equivalent to
cbsc
class 10
olympiad
science
physics
t2
asked
Sep 18, 2017
by
priyanka.c
1
answer
The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book at 25 cm from the eye?
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class 10
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science
physics
t2
asked
Sep 18, 2017
by
priyanka.c
1
answer
Which has greater resistance, a toaster of 1KW and an electric heater of 2KW?
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class 10
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asked
Sep 18, 2017
by
priyanka.c
1
answer
The amount of charge that would flow in 2 hours through the element of an electric bulb drawing a current of 0.25 A is
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class 10
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Sep 18, 2017
by
priyanka.c
1
answer
In Faraday's experiment when the magnet is stationary, there is
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asked
Sep 18, 2017
by
priyanka.c
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