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Summary of this lecture : 1) Transformer is a device which transfers electrical energy from one to another circuit using magnetic fields, keeping constant frequency. 2) Its main purpose is to vary the voltage level during transmission so that we can have lower resistive loses from wires, without increasing their area of cross section, thus reducing the material used. 3) Analogy between electric and magnetic circuit : Current Flux, Voltage MMF (= NxI), Resistance ( = resistivity*L/A) = Reluctance (= L/(A*permiability)), Conductivity Permeability, Electric Field (= V/L) = Magnetic Field (H = MMF/L), Current density (J=I/A=resistivity*E) Magnetic Flux Density (B = Flux/Area = H/mobility). 4) Faradays Law : Magnitude of induced emf inside a single coil, will be equal to rate of change of magnetic flux linked in that coil. (Linked means flux inside coil and perpendicular to area of cross section of that coil.) 5) Lenz's Law : Induced emf inside the flux would be such that, if the coil is closed, than a current would be produced in such a direction that the flux produced by that current will oppose the flux due to which it was produced. (Son attacking Father) 6) Ideal Transformer : Assumptions : (1) No Resistive loss in coils, ie, infinite conductivity. (2) No reluctance loss in core, ie, infinite permeability. (3) Source is an infinite power generator. (4) No leakage Flux. (Conservation of energy) Flux is generated without any current or say a current tending to 0 due to infinite permeability of the material. As the flux links two coils, any change in flux will cause an induced emf based of faradays law in both the coils. As resistive losses are 0, so, E1=V1 and E2=V2. I1 initially would be 0, I2 will be generated due to load. I2 will created an induced flux, to counter it and keep Flux inside core constant, I1 will be generated. MMF balance is seen here. N1*I1 = N2*I2 and V1/V2 = E1/E2 = N1/N2. Also, P1 = P2. I1---I2 in ideal transformer will be in same phase. E1 and E2 will be in same phase. E1 and E2 will always lead Flux and I1,I2 will depend on load value.
Summary of this lecture : 1) Transformer is a device which transfers electrical energy from one to another circuit using magnetic fields, keeping constant frequency. 2) Its main purpose is to vary the voltage level during transmission so that we can have lower resistive loses from wires, without increasing their area of cross section, thus reducing the material used. 3) Analogy between electric and magnetic circuit : Current Flux, Voltage MMF (= NxI), Resistance ( = resistivity*L/A) = Reluctance (= L/(A*permiability)), Conductivity Permeability, Electric Field (= V/L) = Magnetic Field (H = MMF/L), Current density (J=I/A=resistivity*E) Magnetic Flux Density (B = Flux/Area = H/mobility). 4) Faradays Law : Magnitude of induced emf inside a single coil, will be equal to rate of change of magnetic flux linked in that coil. (Linked means flux inside coil and perpendicular to area of cross section of that coil.) 5) Lenz's Law : Induced emf inside the flux would be such that, if the coil is closed, than a current would be produced in such a direction that the flux produced by that current will oppose the flux due to which it was produced. (Son attacking Father) 6) Ideal Transformer : Assumptions : (1) No Resistive loss in coils, ie, infinite conductivity. (2) No reluctance loss in core, ie, infinite permeability. (3) Source is an infinite power generator. (4) No leakage Flux. (Conservation of energy) Flux is generated without any current or say a current tending to 0 due to infinite permeability of the material, as it links two coils, any change in flux will cause an induced emf based of faradays law in both the coils. As resistive losses are 0, so, E1=V1 and E2=V2. I1 initially would be 0, I2 will be generated due to load. I2 will created an induced flux, to counter it and keep Flux inside core constant, I1 will be generated. MMF balance is seen here. N1*I1 = N2*I2 and V1/V2 = E1/E2 = N1/N2. Also, P1 = P2. I1---I2 in ideal transformer will be in same phase. E1 and E2 will be in same phase. E1 and E2 will always lead Flux and I1,I2 will depend on load value.
the following test data were taken on a 30-kva, 2400/240 v, 50-hz, single-phase transformer: open − circuit test ∶ v = 2400 v, i = 0.3 a, p = 230 w short − circuit test ∶ v = 70 v, i = 18.8 a, p = 1050 w determine the primary voltage, real and reactive power input, and efficiency, when a current of 12.5 a at 240 v is drawn from the low-voltage side by a load of 0.8 p. f. lagging
There is no difference in phase of flux and Im . However phase difference exit between no load current and flux . Continue with second lecture so that you will have better understanding of practical transformer
Transforming something means changing its form . Since this static device is used to change the form of the voltage(increase or decrease)so it's called Transformer.
Dear GATE Aspirants, Lecture notes, DPP, Video and everything related to the class will be provided on the PW App. Inside the PW App, Gate Crash Course and Abhyas Batch for every class are created in the GATE category. There you can enroll in a free batch and access Videos, Notes, and DPPs.
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▶ Our Telegram Page: t.me/gatewallah_official
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Dear GATE Aspirants, Any irrelevant/abusive comment will not be tolerated, students doing so will be blocked immediately.
Your voice clarity is not good ...
Fati speaker ki tarah awaz kartehoo bhai..
Summary of this lecture :
1) Transformer is a device which transfers electrical energy from one to another circuit using magnetic fields, keeping constant frequency.
2) Its main purpose is to vary the voltage level during transmission so that we can have lower resistive loses from wires, without increasing their area of cross section, thus reducing the material used.
3) Analogy between electric and magnetic circuit : Current Flux, Voltage MMF (= NxI), Resistance ( = resistivity*L/A) = Reluctance (= L/(A*permiability)), Conductivity Permeability, Electric Field (= V/L) = Magnetic Field (H = MMF/L), Current density (J=I/A=resistivity*E) Magnetic Flux Density (B = Flux/Area = H/mobility).
4) Faradays Law : Magnitude of induced emf inside a single coil, will be equal to rate of change of magnetic flux linked in that coil. (Linked means flux inside coil and perpendicular to area of cross section of that coil.)
5) Lenz's Law : Induced emf inside the flux would be such that, if the coil is closed, than a current would be produced in such a direction that the flux produced by that current will oppose the flux due to which it was produced. (Son attacking Father)
6) Ideal Transformer :
Assumptions :
(1) No Resistive loss in coils, ie, infinite conductivity.
(2) No reluctance loss in core, ie, infinite permeability.
(3) Source is an infinite power generator.
(4) No leakage Flux.
(Conservation of energy)
Flux is generated without any current or say a current tending to 0 due to infinite permeability of the material.
As the flux links two coils, any change in flux will cause an induced emf based of faradays law in both the coils. As resistive losses are 0, so, E1=V1 and E2=V2. I1 initially would be 0, I2 will be generated due to load. I2 will created an induced flux, to counter it and keep Flux inside core constant, I1 will be generated. MMF balance is seen here.
N1*I1 = N2*I2 and V1/V2 = E1/E2 = N1/N2. Also, P1 = P2.
I1---I2 in ideal transformer will be in same phase. E1 and E2 will be in same phase.
E1 and E2 will always lead Flux and I1,I2 will depend on load value.
It feels very proud as most of the faculties for gate in PW are from Bihar ❤❤.
Summary of this lecture :
1) Transformer is a device which transfers electrical energy from one to another circuit using magnetic fields, keeping constant frequency.
2) Its main purpose is to vary the voltage level during transmission so that we can have lower resistive loses from wires, without increasing their area of cross section, thus reducing the material used.
3) Analogy between electric and magnetic circuit : Current Flux, Voltage MMF (= NxI), Resistance ( = resistivity*L/A) = Reluctance (= L/(A*permiability)), Conductivity Permeability, Electric Field (= V/L) = Magnetic Field (H = MMF/L), Current density (J=I/A=resistivity*E) Magnetic Flux Density (B = Flux/Area = H/mobility).
4) Faradays Law : Magnitude of induced emf inside a single coil, will be equal to rate of change of magnetic flux linked in that coil. (Linked means flux inside coil and perpendicular to area of cross section of that coil.)
5) Lenz's Law : Induced emf inside the flux would be such that, if the coil is closed, than a current would be produced in such a direction that the flux produced by that current will oppose the flux due to which it was produced. (Son attacking Father)
6) Ideal Transformer :
Assumptions :
(1) No Resistive loss in coils, ie, infinite conductivity.
(2) No reluctance loss in core, ie, infinite permeability.
(3) Source is an infinite power generator.
(4) No leakage Flux.
(Conservation of energy)
Flux is generated without any current or say a current tending to 0 due to infinite permeability of the material, as it links two coils, any change in flux will cause an induced emf based of faradays law in both the coils. As resistive losses are 0, so, E1=V1 and E2=V2. I1 initially would be 0, I2 will be generated due to load. I2 will created an induced flux, to counter it and keep Flux inside core constant, I1 will be generated. MMF balance is seen here.
N1*I1 = N2*I2 and V1/V2 = E1/E2 = N1/N2. Also, P1 = P2.
I1---I2 in ideal transformer will be in same phase. E1 and E2 will be in same phase.
E1 and E2 will always lead Flux and I1,I2 will depend on load value.
Thanks for the summary brother, came here to revise and just your comment was enough for that.
save my time brooooooooooo
Best teacher got for Electrical machines ❤❤❤❤❤❤
Best teacher ❣️❣️❣️❣️❣️❣️👍☺️ thanqu physics wallah 🤓
Sir you look like kumar shanu and teach in nice way thank you ji ❤❤
#MAZA AA GYA GURUJI
Very good explanation sir..
pura khol dia sir...nice
Thanks you sir,
Maine pahali bar electrical machine ko feel kiya
Abhi mai polytechnic karta hu but maza aa gaya sir
❤❤❤❤❤❤❤❤
You are awesome sir🧡........
maza aagya aaj..Love u sir!
❤❤
Jai hind sir 🇮🇳 and Thank you sir.. bhot maza aaya 💙💙
the following test data were taken on a 30-kva, 2400/240 v, 50-hz, single-phase transformer: open − circuit test ∶ v = 2400 v, i = 0.3 a, p = 230 w short − circuit test ∶ v = 70 v, i = 18.8 a, p = 1050 w determine the primary voltage, real and reactive power input, and efficiency, when a current of 12.5 a at 240 v is drawn from the low-voltage side by a load of 0.8 p. f. lagging
First class.... Best class ever
Sir you have shown that Im and Flux doesnot have any phase difference, while it should have.
There is no difference in phase of flux and Im . However phase difference exit between no load current and flux . Continue with second lecture so that you will have better understanding of practical transformer
Maza aa gya sir 🫡
you are amazing sir
❤❤
Thank you sir
Love you sir❤️❤️❤️
You are amazing!!
❤❤
mza aa gya sir
Thank you ❤❤
Sir pdf kha milegi?
insulation kya hota hai?
how to get the lecture notes??!
Kia aap ko notice mil gaye?
Wow
Can you translate your classes in english it will be helpful for South Indian students
#maja
Any one suggest best youtube class for rrb je
❤️❤️❤️
Ham aapka pd par course dekh rahe hai
Gate Acedmy teacher hai aap
Sir transformer ko transformer hi kyu kahte hain koi aur name bhi ho skta tha..
??
Tumhara naam adesh hi kiyon hai admi kiyon nhi
Transforming something means changing its form . Since this static device is used to change the form of the voltage(increase or decrease)so it's called Transformer.
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👍👍👍
♥️
Sir no body tell y their is needed of xmer😊
hello sir
😍
Very nice explanation 👍
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