Kuchh Bhi Kahin Bhi Kabhi Bhi tech

Cuts on the electric plug Ye cut sabhi plug me dekhne ko nhi milta hai ,ye sirf 'Brass' material ke pin wale plug me hota hai, brass matlab 'peetal' ke pin wale plug me hota hai,  Jabki aap ko aluminium ke pin wale plug me koe bhi cut dekhne ko nhi milega . Kuch plug me aluminium ke color wale  pin lga hota hai jisme bhi cut hota hai, ye pin bhi brass material ka bna hota hai, brass material per jang (Rush)  lagne ki chances hoti hai isliye isper 'Nickel' (Ni) chemical ki coating ki jati hai jo pin me jang (Rush) lagne se bachta hai  or pin ki strength  ko bhi improve kerta hai , isliye ye hmme aluminium ke jaisa lagta hai. Why cut on the plugs - plug ke pin brass material ka hota hai or brass ki conductivity bhi sahi hoti hai, but iska ek nuksan bhi hai ki ye material jyada heat hone ke wajah se ye pin failne (spreading)  hone lgta hai . Jb hmm plug ko kisi socket me lgate hai or usme jyada current flow hota hai, tb jyada current flow hone ki wajah se heat...

Q)   Transmission line per insulation kyon nhi hota hai ? 1) Transmission line per voltage bahut jyada hota hai, 220,440,765 KV, or isse bahut jyada dur tk transmit kiya jata hai ager hmm isper insulation lgayege to transmission line ki cost bahut jyada ho jayegi.  2) Ager hmm transmission line per insulation lgayege tb transmission line ka weight bhi jyada ho jayega, or line ka weight tower per hi hota hai isliye hmme tower ko bhi strong kerna haga isse bhi transmission line ki cost jyada ho jaygi.  3) transmission line ground se bahut height per hota hai, jiski wajah se insulation ki jarurt nhi hoti hai.  4) jyada height per hone ki wajah se waha per air ka flow bahut jyada hota hai, high voltage hone ki wajah se wire me heat bhi bahut hota hai, height per hone ki wajah se Air heat ko cool kaene me help karta hai.  5) Transmission line me ACSR (aluminium conductor steel- reinforced cable)  ka use hota hai, isme steel or aluminium ka use kiya jata hai...

  Electrician interview questions answer   1) what is transformer rating unit ? Transformers rating unit is Kilo volt ampere (KVA)  2) Running condition me jo transformer se sound niklta hai usse kya kahte hai ? Running condition me jo transformer se jo sound ataa hai usse 'Humming sound ' kahte hai.  3) how many types of electrical load  ? There are three types of load  I)  Resistive load (unity power factor)  II) Inductive load ( lagging power factor)  III)  Capacitive load ( leading power factor)  4) what is unit of electric current  ? The unit of electric current is 'Ampere.' (A) . 5) what is the best conductor of electricity  ? The best conductor of electricity is 'Silver'  Ranking Metal 1 Silver  (Pure) 2 Copper 3 Gold  (Pure)

 Electrician interview questions answer  1) what is electrical motor ? An electric motor is a device that converts electrical energy into mechanical energy.  इलेक्ट्रिक मोटर एक उपकरण है जो विद्युत ऊर्जा को यांत्रिक ऊर्जा में परिवर्तित करता है। For example - Jb hmm motor ko electrical supply dete hai jo ki electrical energy hota hai or motor ka shaft ghumne lgta hai, shaft ka ghumna mechanical energy hai.  2) What is generator ? A generator is device that convert mechanical energy into electrical energy.  जनरेटर वह उपकरण है जो यांत्रिक ऊर्जा को विद्युत ऊर्जा में परिवर्तित करता है। 3) what is transformer ? A Transformer is a static electrical machine which transforms AC electrical power from one circuit to the other circuit at constant frequency, but voltage can be increased or decreased to the requirements.  ट्रांसफार्मर एक स्थिर विद्युत मशीन है जो निरंतर आवृत्ति पर एसी विद्युत शक्ति को एक सर्किट से दूसरे सर्किट में बदल देती है, लेकिन वोल्टेज को आवश्यकताओं क...

 Electrician interview questions answer  1)  μF  and MFD me difference (capacitor)  ?   μF  or MFD done ek hi unit hai capacitor ki ,jaha M or  μ  ka Matlab micro hota hai,  F or FD ka matlab farad hota hai.  For example - 2.5  μF  or 2.5 MFD dono ek hi hai.  2) AC and DC  motor me kon jyada RPM per ghumta hai ? AC and DC motor me jyada RPM per DC motor ghumti hai. AC motor jyada se jyada 3000 RPM per ghumta hai . But 12 volt ki DC motor ki speed 5000 - 10000 RPM hoti hai, isliye DC motor jyada RPM per ghumta hai.  3) train me konse motor ka use karte hai? ? Pahle ki trains me DC series motor ka use hota tha, jitne bhi DC series motor wale engine hai wo abhi bhi use hote hai, but jo New engine bnaye ja rhe hai usme 3 phase squirrel cage induction motor ka use ho rha hai. 

 Electrical interview questions answer  1) Series and parallel connection kya hai? Series connection - ager hmm sirf ek supply wire me kai device ko connect karke chalate hai, tb wo series connection kahlata hai.  Parallel connection - ager hmm sabhi device ko personally supply wire me connect kerte hai to wo parallel connection kahlata hai . for example - ceiling fan, mobile charger, TV, bulbs etc, insab ko hmm alag alag supply dete hai, phase  neutral.  2) electrical bulb me konsa filament use karte hai ? Electrical bulb me tungsten wire ka use kiya jata hai, quki tungsten ka melting point (3422 degree Celsius)  hota hai joki bahut jyada hai as compare to copper, aluminum.  Copper melting point ( 1085 degree Celsius)  Aluminum melting point ( 660.37 degree Celsius)  3) Electrical heater me konsa filament use hota hai ? Electrical heater me Nichrome wire ka use karte hai jiska melting point approximate (1400 degree Celsius)  hota hai....

 Electrician interview questions answer  1) Isolator and circuit breaker me difference  -  *) isolator or circuit breaker ye dono hi electrical device ko switch On - OFF karte ke liye use me lete hai. But isolator hmhe kisi bhi fault se protection nhi provide krata hai ,jabki circuit breaker fault hone per apne aap circuit OFF ker deta hai.  *) Isolator ko hmm no load per open karte hai and circuit breaker full load per open hota hai.  2) phase voltage and line voltage me difference  -  *) phase voltage  -  Jb hmm kisi ek phase or neutral /earth ke bichh voltage ko measure karte hai, tb ye phase voltage kahlata hai, isse ( Vph) se denote karte hai.  *) line voltage  - jb hmm kisi bhi two phase or line ke bichh me voltage ko measure karte hai tb wo line voltage kahlata hai, isse hmm ( VL) se denote karte hai. 

 What is power factor - the cosine of angle between voltage and current is called power factor.  वोल्टेज और करंट के बीच के कोण के कोसाइन को पावर फैक्टर कहा जाता है। Types of power factor  1) Unity power factor  2) lagging power factor  3) leading power factor  Types of power factor ko samajhne keliye hmhe sabse phle, Types of electrical load ko samajhna hoga.  Types of electrical load  1) Resistive load  2) Inductive load  3) Capacitive load  1) Resistive load - wo device jisme resistance hota hai usme resistive load kahte hai. For example - bulb, heater, water heater, Iron, etc . Isme unity power factor hota hai, quki voltage and current ki waveform sath me cross karti hai zero degree per, jiske karan voltage or current ke bicch me koi angle nhi banta hai . Power factor ko hmm cos   θ  se denote karte hai.    θ  = Angle between voltage and current    θ  = 0 Cos(0) = 1 (unity power factor)...

  Why transformers rating in KVA - jaisa ki hm jante hai ki transformer ek electrical device hai, jo output me electrical energy deta hai, isme kuch losses bhi hote hai, jisme se ek copper loss hota hai jo current per depend karta hai ye current variable hota hai , dusra core loss jo voltage per depend karta hai jo ki constant hota hai, transformer current and voltage per depend kerta hai, isliye iski rating 'VA'  me karte hai, ager transformer chota hoga to VA me,  ager medium size ka hoga to KVA me, ager bahut heavy power ka hoga to MVA me rating karte hai . Jo manufacturing karta hai transformers ki usko pta nhi hota ki transformer ke output me konsa device lgega ya uska power factor kya hoga, isliye transformer ka  power factor hmhe nhi pta hota hai, isliye transformer ki rating KVA me karte hai, ager transformer ka power factor hmhe pra hota tb hmm transformer ki rating KVA me na karke KW me ker sakte the  .

 Why used 50Hz frequency in India - jo first electricity generate or invention hua tha wo "direct current (DC) "thi ,jo USA me hua tha, jiska invention "Thomas Alva edition "ne kia tha, jo ki 110Volt per operate hoti thi, but DC ke kuchh disadvantage bhi the ,jiske Karan "Nikola Tesla " ne "Alternative current (AC)  "ka invention kia, first invention jo 240V,3phase,60Hz tha.  60Hz frequency - arc lamp jo 1 sec me 60 bar on off hote hai ,fir Nikola Tesla ne practical kiya or dekha ki, 60Hz frequency jo 1sec me 60 bar on off hoti hai, wo bahut fast hai jisko hamari Akhhe nhi dekh sakti hai or hmhe pta bhi nhi chalega ki lamp on off ho rha hai, wo sirf hame ON hi dikhega, us time unhone 60Hz hi prefer kiya . AC current ki invention ke bad Thomas Alva edition or Nikola Tesla ki bicch me ek War hua tha, jisko "AC vs  DC" War kahte hai.  Is war ke winner "Nikola Tesla " hue quki AC sabko sahi lga, tb us time USA government ne sabko ...

 Losses in the transformer  Main losses in the transformer  1) copper loss or ohmic losses 2) iron or core loss  a)  hysteresis loss b)  eddy current loss 3) stray loss 4) Dielectric loss, etc  1) Iron or core loss - transformer ka core soft iron ka bna hota hai, isliye core me hi kuchh loss ho jata hai, there are two type of core loss- a) eddy current loss - transformer ke core me thori se bhi jagah khali ho, tb usme ek extra current produce hone lagta hai, jo reverse direction me flow hota hai, or real current ka appose kerta hai, jisse transformer ki efficiency less ho jati hai, isse bachne ke liye core per varnish ka pest lgate hai jisse ki khali jagah na rhe,or loss na ho fir bhi thra loss ho jata hai.  Hysteresis loss - Ek ferromagnetic me jb current supply kerte hai ,tb usme magnet ki properties create ho jati hai, transformer sin wave per work kerta hai, jb sin wave +ve hoga tb magnet on hoga or jb -ve hoga tb magnet off hoga, mtlab ek bar...

 Transformer -  A  transformer  is defined as a passive electrical device that transfers electrical energy from one circuit to another through the process of electromagnetic induction. It is most commonly used to increase ('step up') or decrease ('step down') voltage levels between circuits. एक ट्रांसफार्मर को एक निष्क्रिय विद्युत उपकरण के रूप में परिभाषित किया गया है जो विद्युत चुम्बकीय प्रेरण की प्रक्रिया के माध्यम से विद्युत ऊर्जा को एक सर्किट से दूसरे में स्थानांतरित करता है।  यह आमतौर पर सर्किट के बीच ('स्टेप अप') या घटने ('स्टेप डाउन') वोल्टेज के स्तर को बढ़ाने के लिए उपयोग किया जाता है।  Main Part of transformer These include core, windings,  transformer  oil, conservator, breather, cooling tubes, Buchholz Relay etc  Core - core means middle part of transformer  Core is made of soft  iron  Core ko mota karne ke liye patle Patle iron ko varnish ke through stick Krte hai aisa isliye karte hai ki usme eddy current prod...

 Fault - A fault in a electrical equipment it's defined as a defect in the electrical circuit due to which current is diverted from the intended path.  Short circuit fault  * Resistance zero  * current infinite  Open circuit  * Resistance infinite  * Current zero  Main kind of fault  The most common and dangerous fault that occur in a power  system is the short circuit or short fault, they occur as a result of breakdown in the insulation of current carrying phase conductor relative to earth or in the insulation between phases.  In three phase AC power circuit the short circuit fault can be classified as two part  1) unsymmetrical fault  2) symmetrical fault  * unsymmetrical fault  a) Single phase to ground fault [LG] - due to breakdown of insulation  between one of the phase and earth  The occurrence of this fault is 70% This is the least severe fault  b)  Phase to phase or line to line fault ...

  Law of Thermodynamics  Thermodynamics - thermodynamics is a branch of science which deals with the energy transfer or heat converted into work.  There are four basic law of thermodynamics - 1) first law of thermodynamics  2) second law of thermodynamics  3) third low af thermodynamics  4) zeroth law of thermodynamics  1) first law of thermodynamics - According to first law of thermodynamics the energy can nither be created nor be destroyed but it converted from one form of energy to  other form of energy  Q = delta U + W Q = total heat  Delta U = total internal energy change  W = weak output  Second law of thermodynamics  - the second law of thermodynamics  is comprises  two statement -  1) Kelvin - Plank statement  2) Clousious statement  Kalvin - plank statement - According to Kelvin plank statement it is impossible to construct engine which give 100% efficiency, there are no other effect expec...

 Ab smart phone hoga Air se charge  Ji ha kya aap jante hai ki smart phone Ab air se bhi charge ho sakta hai  "MI Xiaomi Air charger technology " Xiaomi ne introduce kiya hai "Air charger Bina charging kiye apka phone charge ho sakta hai. Jb aap charger ke specific area me entry  kerte hai tb apka phone air ke through charge hone lagta hai Wo bhi bina wire ke