gieft gright Emiddle An E-core with three air-gaps is give in the figure with dimensions of left mean corslength 10 cm, right mean core length 10 cm, middle leg mean core length of 4 cm and core cross section of 1 cm2 and uniform through the geometry except 2cm2 at middle leg. 2. Now assume the core is made out of a high-quality material “B" with a relative permeability of 15000. Solve the parts below. Comment on your findings. What is the reason of change, or lack thereof? How does adding an air-gap to a ferrous core affect the inductance? a) Calculate the coil inductance when there are no air-gaps. Left air gap is equal to the right air gap and when g left-g right=x cm, g middle= x+ 0.1 cm. While left and right air gaps are simultaneously changed between 0 em
Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
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