________________
4. Self Induction
We have learnt that when a current passes through a coil, some magnetic field is created so that the coil itself behaves like a magnet. The magnetic flux produced by the current in the coil is linked with the coil itself (fig. 8), and when the current in the coil changes, this flux linked with the coil also changes. Under such circumstances also. there would be an emf induced in the coil which is called the self induction". If the number of turns in a coil is N and the flux linked with each turn is (P), then the total flux linked with the coil is N(0)
0 0 0 0 0
The parameter L (i.e., total flux due to unit current) here is called the self-inductance of the coil. Its value depends upon the size and shape of the coil as well as the number of turns. It also depends upon the within the coil, e.g., if magnetic property of the medium of the space the coil is wound around a soft iron core (after ensuring proper insulation) it attains a very large value.
24. जैसे फोटोन कण और तरंग दोनों रूप में व्यवहार करते हैं, वैसे ही इलेक्ट्रोन भी कण और तरंग दोनों रूप में व्यवहार करते हैं । इस तथ्य को भौतिकशास्त्र में इस प्रकार समझाया गया है।
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64
Satish K. Gupta, op. cit., pp. 1093, 1094
Dual Nature of Radiation
The phenomena such as interference, diffraction and polarisation were successfully explained on the basis of wave nature of light. On the other hand, photoelectric effect, Compton effect, etc. can be explained on the basis of quantum nature of radiation. For instance, in photoelectric effect, when a photon of radiation strikes a metal surface, it gives up all its energy to a single electron in an atom and the electron is knocked out of the metal. It carries a part of the energy of the incident photon. In Compton effect, when an X-ray photon is incident on a free electron, the electron recoils along a definite direction with
तुलसी प्रज्ञा अंक 124
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