Interested to Buy Any Domain ? << Click Here >> for more details...
Why DC current is not used in transformer?
- 20 Answers
- 42238 Views
- JK Paper, TCS, I also Faced
- E-Mail Answers
Answer Posted / deepa james
when ac is applied to the primary winding an alternating flux is produced in the core which then links with the secondary winding of transformer and induces emf ..
when dc is applied to the primary winding no alternating flux is produced and secondary cannot be linked..thus emf is not induced..
as we know a emf is induced only when a conductor is cut by an alternating magnetic field...so ac is applied to transformer..
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
What is relation between mu(nought) and epsilon(nought)?
upto how many load can v connect to stabilizer which is used for tv
What is pd controller?
hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com
All the socket in a room become very hot, the Wall was also became very hot and the earth conductor also became live, what in your view might be the possible causes?
what is meant by surge? what we called for high currents?
How is the resonant peak, resonant frequency, and bandwidth determined from nichols chart?
what is the chemical name and formula of refrigarent R-134a.
sugest any typical project ?
i applied for the ap transco please forward the freqventley asked QA
What is the requirement of grounding the neutral of single phase generators on load? If the neutral is not grounded, what will be the effect?
how copper and aluminium wires or cables are choose for current rating? please provide copper and aluminium wire selection chart for different current rating ?
I am applying for NTPC examination.Can we please provide previous paper to my mail prasad.chintala108340@gmail.com
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
How to decide the size of the capacitor for a single phase induction motor say 2 HP ??
