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चार महीने का बच्चा कैसे बना अरब़पति

चार महीने का बच्चा कैसे बना अरब़पति? जन्म के सिर्फ चार माह बाद यदि कोई बच्चा अरबपति बन जाए तो इसे उसकी किस्मत ही कहेंगे। भारत के एकाग्रह रोहन मूर्ति नाम के बच्चे की किस्मत कुछ इसी प्रकार चमकी है। देश की दूसरी सबसे बड़ी आइटी कम्पनी इंफोसिस के फाउंडर नारायण मूर्ति ने सोमवार अपने चार महीने के पोते एकाग्रह मूर्ति को 240 करोड़ रूपए के शेयरों की हिस्सेदारी का तोहफा देकर उसे शायद देश का सबसे कम उम्र का अरबपति बना दिया है। BSE की फाइलिंग के अनुसार इंफोसिस में अब एकाग्रह रोहन की 15 लाख शेयरों की हिस्सेदारी हो गई है। इसका मतलब अब एकाग्रह रोहन इंफोसिस का 0.04% का हिस्सेदार है। शेयरों के स्थानान्तरण के बाद नारायण मूर्ति के पास कम्पनी के कुल शेयरों का 0.36% हिस्सा बचा है। जिस समय नारायण मूर्ति द्वारा अपने पोते को शेयर देने की खबर बाई उस समय इंफोसिस के शेयरों में गिरावट देखने को मिल रही थी। एकाग्रह रोहन, नारायण मूर्ति तथा सुधा मूर्ति के बेट रोहन मूर्ति और उनकी पत्नि अर्पणा कृष्णन का बेटा है। आपको यह पता होगा कि नोरायण मूर्ति ने अपनी पत्नि सुधा मूर्ति से 10 हजार रूपए उधार लेकर 1981 में इंफोसिस क
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Types of power diodes | Power electronics

Types of Power Diodes

  • The power diodes are mainly classified into following three categories:

General purpose diode

  • The value of trr for these diodes are vey high, and it is about 25µs.
  • The current rating for general purpose diode is from 1A to several thousand amperes.
  • The voltage rating of general purpose diodes are from 50V to 5kV.

Uses

  • The general purpose diodes are used in battery charger.
  • These diodes are also used in electric traction.
  • The general purpose diodes are also used in electroplating.
  • In welding works, the general purpose diodes are very useful.
  • These diodes are used in uninterruptible power supply (UPS) too.

Fast recovery diode

  • The value of trr of fast recovery diode is low and it about 5µs or less.
  • Its current rating is from 1A to several thousand amperes.
  • The voltage rating of fast recovery diodes are from 50V to 3kV.
  • If we require the voltage rating of fast recovery diode below 400V, then the epitaxial process is used for diode fabrication and for such diode trr ≈ 50ns.
  • And for voltage rating of fast recovery diode above 400V, the diffusion process is used for diode fabrication.

Uses

  • The fast recovery didoes are used in choppers.
  • The fast recovery diodes are also used in communication circuits.
  • The switched mode power supplies (SMPS) also uses fast recovery diodes.
  • The fast recovery diodes are used in induction heating also.

Schottky diode

  • In schottky diodes metal-to-semiconductor junction is used for rectification purpose instead of pn-junction.
  • The schottky diodes have very fast recovery time and low forward voltage drop.
  • The reverse voltage rating of schottky diodes is about 100V.
  • Also the forward current rating of schottky diodes are from 1A to 300A.

Uses

  • The schottky diodes are used in high frequency instrumentation.
  • These diodes are also used in switching power supplies.
To know about this lecture in more detail please visit on https://youtu.be/BD8wa_o_31U
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