susceptibility
harshal asks
The susceptibility of annealed iron at saturation is 5500.find its permeability at saturation
Ans: The absolute permeability, μ( = B/H) and the volume susceptibilityκ (= J/μ0H), are related by the equation: μ = μ0(1 + κ)
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CONDUCTING SLAB BETWEEN THE PLATES
How the value of capacitance change if we introduce conducting slab in between?
Sureshkumar kve
Capacitance increases as the distance between the plate reduces
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TENSILE FAILURE STERSS
john Alexander asks
Is the energy required to break a sample of string proportional to the length of string or is the energy requirednto break the sting constant?
Ans
The energy required to break a string depends on the stress known as tensile failure stress.It is not related to the length of the string .for more knowledge ref. Mohr’s theory
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Theorem of parallel axis
State the theorem of parallel axes for the moment of inertia.
Maulik
Ref http://hyperphysics.phy-astr.gsu.edu/hbase/parax.html
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magnetic field
Which one we should use Bio saverts law or amperes law to find a magnetic field?
chirag
Answer
Both are used to find the magnetic field .In the case of physical magnet Biot-Savarts law can be used
In the case of a current carrying conductor Ampers circuital law is used
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Tensor
streess is tensor,then,what is meant by tensor?
rupasri
Ans:
Tensors are used to represent the relation between vectors. They are geometrical objects which show’s the relation between vectors, vectors and scalars.It is a geometrical maping of the relations .Tensor analysis ,a branch in mathematics is helping to solve the complex equations in which many vectors are involved
for further reference visit http://www.grc.nasa.gov/WWW/k-12/Numbers/Math/documents/Tensors_TM2002211716.pdf
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SPEED OF LIGHT AND REFRACTION
How light maintain its speed after refraction.
Dr. Naveen Saxena
n=c/v,naturally velocity of light decrease in refraction.but even even then it has the velocity in the order of 108m.In refraction,
the frequency of light remains the same ,but the wavelength
changes
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