## 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/μ_{0}H), are related by the equation: μ* =

*μ*

_{0}(1 +

*κ*)

## 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

## 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

## Theorem of parallel axis

State the theorem of parallel axes for the **moment of inertia**.

Maulik

## 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

## 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 10^{8}m.In **refraction**,

the **frequency** of **light** remains the same ,but the **wavelength**

changes