Advertisements
Advertisements
Question
Mention two main sources of power loss in real transformers.
Advertisements
Solution
Two causes of energy loss in a transformer are:
- Heat loss due to copper: It is the loss of heat energy over the resistance of the copper winding in the primary and secondary coils.
- Hysteresis loss: The loss caused by the heating of the core as a result of its repetitive magnetization and demagnetization cycles when an alternating emf is applied across the primary coil.
APPEARS IN
RELATED QUESTIONS
How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of the coil in them?
Name two kind of energy loss in a transformer. How is it minimized?
The input and output voltage of a transformer are 220 V and 44 V respectively. Find: the turns ratio.
Define a Transformer.
Magnetic flux Φ in weber in a closed circuit of resistance 10Ω varies with time Φ (sec) as Φ = 6t2 - 5t + 1. The magnitude of induced current at t = 0.25s is ______.
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?
Which winding is the input coil connected to the AC source?
What is the induced EMF in the primary coil?
For an ideal transformer with \[\frac{V_s}{V_p}=3\], what is \[\frac{I_p}{I_s}\]?
