English

Describe Briefly and Two Energy Losses, Giving the Reasons for Their Occurrence in Actual Transformers ?

Advertisements
Advertisements

Question

Describe briefly and two energy losses, giving the reasons for their occurrence in actual transformers ?

Advertisements

Solution

Energy losses occur in transformers:

(i) Flux leakage: Not all of the flux due to primary coil passes through the secondary due to poor design of the core or the air gaps in the core.

(ii) Eddy currents: The alternating magnetic flux induces eddy currents in the iron core and causes heating.

shaalaa.com
  Is there an error in this question or solution?
2011-2012 (March) Foreign Set 1

RELATED QUESTIONS

State the principle of transformer working with the help of a diagram


The transformer is used in ______ current circuits.


Draw a labeled diagram of a full wave rectifier circuit. State its working principle. Show the input-output waveforms ?


Transformer works on ______.


A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A. Then its efficiency is


A transformer is essentially an a.c. device. It cannot work on d.c. It changes alternating voltages or currents. It does not affect the frequency of a.c. It is based on the phenomenon of mutual induction. A transformer essentially consists of two coils of insulated copper wire having different numbers of turns and wound on the same soft iron core.

The number of turns in the primary and secondary coils of an ideal transformer is 2000 and 50 respectively. The primary coil is connected to a main supply of 120 V and secondary coil is connected to a bulb of resistance 0.6 Ω.

The value of current in the bulb is ______.


Draw the effective equivalent circuit of the circuit shown in figure, at very high frequencies and find the effective impedance.


The primary coil of a transformer has 60 turns whereas its secondary coil has 3000 turns.

If a 220 V ac voltage is applied to the primary coil, how much emf is induced in the secondary coil?


A 12 V, 60 W lamp is connected to a 220 V AC supply using an ideal transformer. Find the primary current.


A step down transformer connected to an AC mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×