Copper loss
The correct answer is Copper loss.
Transformer losses can be broadly classified into two categories: constant losses (independent of load) and variable losses (dependent on load). Let's examine each option:
- Eddy current loss: This loss is primarily determined by the frequency of the supply and the material properties of the transformer core. It remains relatively constant during normal operation.
- Stray loss: Stray losses are largely due to leakage fluxes and are also relatively constant during normal operation.
- Copper loss (I²R loss): This loss is due to the resistance of the windings and is directly proportional to the square of the load current. Therefore, it varies significantly with the transformer's load.
- Hysteresis loss: This loss is dependent on the frequency and the magnetic properties of the core material. It's largely constant during normal operation.
Therefore, only copper loss, being directly related to the load current (I²R), exhibits variability during the normal operation of a transformer. The other losses are predominantly constant or nearly constant.
Important Questions from Transformer Copper Losses
What is the condition at which a transformer gives maximum efficiency?
For a single phase transformer, the maximum efficiency occurs at 75% of the load, then \(\rm \frac{iron \ loss \ at\ full \ load }{copper \ loss \ at\ full \ load}=?\)
In a single-phase transformer, the ratio of transformation is 2 and the secondary resistance is 0.24 Ω. Find the resistance of secondary in terms of primary.
A single-phase \(400\;V,\;50\;Hz\) transformer has an iron loss of \(5000\;W\) at the rated condition. When operated at \(200\;V,\;25\;Hz\), the iron loss is \(2000\;W\). When operated at \(416\;V,\;52\;Hz\), the value of the hysteresis loss divided by the eddy current loss is ______.
The full load copper loss and iron loss of a transformer are 6400 W and 5000 W respectively the copper loss and iron loss at half load will be respectively.
