General Knowledge - Physics - Discussion

Discussion Forum : Physics - Section 1 (Q.No. 5)
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
the heating effect of current alone
hysteresis loss alone
both the heating effect of current and hysteresis loss
intense sunlight at noon
Answer: Option
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29 comments Page 2 of 3.

Tabrez alam said:   9 years ago
Light is a wave and a particle why?

Asha said:   9 years ago
Hysteresis loss is created by magnetic core due to alternating flux linkage and the second loss is eddy current loss or current loss. When flux is created electron tends to flow current in the core tends to cause current leakage as heat.

PRACHI said:   9 years ago
What is armature?

Vrishal said:   9 years ago
There is no machine in world that can be 100%used it energy to do work. So every machine losses the energy during working. How is expansion of transforming machine ti it?

Harish Reddy said:   10 years ago
Both the heating effect of current and hysteresis loss.

Madhav said:   10 years ago
Armature means = the part of motor in which current is induced by a magnetic field. The armature usually consist of series of coils and groups of insulated conductors surrounding a core of iron.

Sourabh said:   10 years ago
T/f heating effect depends on frequency and voltage.

Nirakh Rastogi said:   1 decade ago
Heating effect is also due to resistance of wire and it is equal to p=2ir where I is alternating current.

Hysteresis loss is due to the magnetisation and demagnetisation.

Aman said:   1 decade ago
What is armature?

Girja shanker sharma said:   1 decade ago
In a large transformer total current flow is-.
Current in secondary = current in primary - eddy current lose - hysteresis loss.
So we can say the heating of a transformer due to eddy current loss and hysteresis loss.

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