kumar ideology

A (50/60 Hz) Transformer. Which one will give more Output? (When operates on 50 or 60 Hz frequency) A Transformer is designed to be operated on both 50 & 60 Hz frequency.  For the Same rating, which one will give more out put; when,   Operates on 50 Hz    Operates on 60 Hz Obviously!  It will give more out put when we operate a transformer (of same rating) on 50 Hz instead of 60 Hz. Because in previous posts, we proved that, in inductive circuit,  when frequency increases, the circuit power factor decreases . Consequently, the transformer out put decreases. Let’s consider the following example. Suppose, When Transformer operates on  50 Hz  Frequency Transformer = 100kVA, R=700 Ω , L=1.2 H, f= 50 Hz. X L  = 2πfL = 2 x 3.1415 x 50 x 1.2 = 377 Ω Impedance Z = √ (R 2 +X L 2 ) = √ (700 2 + 377 2 ) = 795 Ω Power factor Cos θ = R/Z = 700/795 = 0.88 Transformer Output (Real Power) kVA x Cos θ 100kVA...

Why we can’t store AC in Batteries instead of DC.or Can we store AC in batteries instead of DC? We  cannot store AC in batteries  because AC changes their polarity up to 50 (When frequency = 50 Hz) or 60 (When frequency = 60 Hz) times in a second. Therefore the battery terminals keep changing Positive (+ve) becomes Negative (-Ve) and vice versa, but the battery cannot change their terminals with the same speed so that’s why we can’t store AC in Batteries. in addition, when we  connect a battery with AC Supply , then It will charge during positive half cycle and discharge during negative half cycle, because the Positive (+ve) half cycle cancel the negative (-Ve) half cycle, so the  average voltage or current in a complete cycle is Zero . So there is no chance to store AC in the Batteries. If you want more books, slide, ppt's and notes,Request in the comment section. Visit the site for more knowledge and share this site link to the needy one....

      INTRODUCTION OF TRANSDUCERS  A transducer is a device that convert one form of energy to other form. It converts the measurand to a usable electrical signal.   In other word it is a device that is capable of converting the physical quantity into a proportional electrical quantity such as voltage or current. BLOCK DIAGRAM OF TRANSDUCERS • Transducer contains two parts that are closely related to each other i.e. the sensing element and transduction element.  • The sensing element is called as the sensor. It is device producing measurable response to change in physical conditions.  • The transduction element convert the sensor output to suitable electrical form. CHARACTERISTICS OF TRANSDUCERS 1. Ruggedness  2. Linearity  3. Repeatability  4. Accuracy  5. High stabilityand reliability  6. Speed of response  7. Sensitivity  8. Small size TRANSDUCERS SELECTION FACT...

A book of power system by c. l. wadhwa . . . . . . . . . . . . . ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓ . . . . . . . . . . click here to download the book--- https://drive.google.com/open?id=0B9buDBvxkr5fTmRhTTFiVkFOc2M If you want more books, slide, ppt's and notes,Request in the comment section. Visit the site for more knowledge and share this site link to the needy one. Thank You...

A BOOK OF QUANTITATIVE APTITUDE BY R.S.AGGRAWAL CONTAINING ALL  SOLVED AND UNSOLVED EXAMPLE CLICK HERE  TO DOWNLOAD THE BOOK . . . . . . ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓ . . . . . https://drive.google.com/open?id=0B9buDBvxkr5fZWVhRDBOTzFpbzA . . . . . . . If you want more book online you can request in the comment section , Visit here for more books and share this site link with the needy one.  Thank You

The book for Microprocessor and Micro controller (Book by Ramesh Gaonkar) EEE 3rd year LPU students is available below.Click the link below to download. ↓↓↓↓↓↓↓↓↓↓↓↓↓ https://drive.google.com/open?id=0B9buDBvxkr5fVXY1OWxVQkFlZ0U If you want more book online you can request in the comment section, Visit here for more books and share this links with the needy one. Thank you