Answer / sunil kumar sinha

Ohms law is applicable where there is no induction/
inductance. It is applicable where only resistance is
present. This can happen in D.C. Circuit and ohm's law is
100% applicable in D.C. circuit. In A.C. circuit, impedence
which consist of resistance and inductance is applicable as
load. i.e r+jwL. The inducatance depends on frequency of
system and L (henery).

D.C Circuit : C = V/R, where C is current, V is voltage, R
is resistance

A.C. circuit C = V/Z where Z = R+JWL. Z is impedence, L is
inductance.

Transformer works on the principle of induction and has no
of coils both in the primary and secondary windings.Hence
very high inductance and very low resistance. Here
Impidence (Z) is very close to wL both in primary and
secondary windings as resistance is very low in both the
windings. Hence the transformer circuit does not obey ohm's
law.

Answer / sagar

Ohm's law only applicable to purely resistive circuit in which v --> I relationship is linear.
now in the case of the transformer , there is reactance is exist and there is induction also.It's not purely resistive circuit and v --> I relationship is non-linear.so ohm's law is not applicable to transformer

Answer / xyz

Actually Ohms law is applicable only in those circuits where
Power parameter varies.Since under ideal conditions,in case of
transformer,Power remains the same,thus Transformer does not obey Ohms law

How to Calculate Stc Rating of an indoor type VCB Panel? What is a full form of STC?

1 Answers   ABB,

---

Which material is used for the core of a transformer and why?

0 Answers  

---

we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?

0 Answers  

---

What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

0 Answers  

---

how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

1 Answers   ACC, Bhel,

---

sir, plz tell me how much kvar capacitor required for 1000 amp or 500 Kw load ? what is the formula ?

14 Answers   CSPL,

---

How can we get a Neutral from a three phase suply? If we meet all three phases at a point to take neutral then why dont thay get sparked?

1 Answers  

---

why it is unable to birds to be on a 220kV 0r 132 kv lines like on 33kV and 11kV lines?

4 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

---

Which fault is caused by lightening and thuderstorm a. Line to line fault b. Single line to ground fault c. Double line to ground fault

1 Answers  

---

How shall i select the value of capacitor or inductor in a system?

0 Answers  

---

what do you mean by star connection?

4 Answers   Denver, Satyam,

---

We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will happen?

6 Answers  

---