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Ask QuestionPosted by Aarav Tripathi 6 years, 5 months ago
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Gursharn Kaur 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
Earth is a very good conductor.
Due to this reason, all the electrical or electronic equipment which are used, is firstly earth so that if any leakage current is flow through the body of equipment is to be grounded for safety purpose.
Posted by R S 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
Huygens Principle
- Huygens principle states that each point of a wavefront is the source of secondary wavelets (small waves) which spread in all directions with the speed of the wave.
- The new wavefront is formed by drawing a line tangent to all the wavelets.
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Yogita Ingle 6 years, 5 months ago
A diode is a device which has two active electrodes and two terminals and allows the current to pass only in a single direction. These devices are used to protect circuits by limiting the voltage and also turn AC into DC. Semiconductors like silicon and germanium are used to make most of the diodes. Even though they transmit current in a single direction, the way with which they transmit differs. There are different kinds of diodes and each type has its own applications.
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Yogita Ingle 6 years, 5 months ago
Diamagnetic Material
A material that turns at a right angle to the field by producing a magnetic response opposite to the applied field is called diamagnetic material such as silver, copper, and carbon have permeability’s slightly less than free space (for copper, μr= 0.9999980).
Paramagnetic Material
A material aligning itself with the applied field is called paramagnetic material. Paramagnetic materials such as aluminum and air have permeability’s slightly greater than that of free space (for air μr =1.0000004). The effects of diamagnetic and paramagnetic are negligibly small so that materials possessing these weak phenomena are said to be non-magnetic.
Ferromagnetic Material
Within the paramagnetic class of materials, is a special classification of materials called ferromagnetic material. These materials are strongly attracted to magnets and exhibit Paramagnetism to a phenomenal degree. Ferromagnetic materials such as iron, steel, cobalt and their alloys have relative permeability’s extending into the hundreds and thousands, are said to be magnetic.
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Gaurav Seth 6 years, 5 months ago
Diagram representing the arrangement of orbitals in order of their increasing energies are called energy level diagrams.
Important observations from energy level diagrams of multi electron atoms are:
1)The sub shell of a particular shell do not have equal energies.For Ex: 2s and 2p have different energies.
2)In a particular shell, sub shell with lower value of l has lower energy. In the second shell, 2s ( l=0) has lower energy than 2p ( l=1) .In the 3rd shell, energies are in the order: 3s < 3p < 3d.
In the 4th shells, they are in the order of 4s <4p< 4d< 4f.
3)For the same value of n, the differences between energies of s and p sub shell is small whereas between p and d sub shell, it is large and so on.
4)As the value of n increases ,the sub shell of lower shell may have higher energy than that of a higher shell, 3d has higher energy than 4s.
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Ron Vineetahuja 6 years, 5 months ago
1Thank You