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
No answer description is available. Let's discuss.
29 comments Page 1 of 3.

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

Jerome said:   6 years ago
I think it is as a result demagnetization and the magnetization processes.

Izengo said:   6 years ago
Tell me the meaning of magnetisation and demagnetization.

Faruq Lawal said:   6 years ago
Too much of heat reduce the current generation H = I^2RT.

Pavankumar said:   6 years ago
What is hysteriosis?

Giri said:   8 years ago
What is transformer?

Devan said:   8 years ago
There are several losses in transformer design the hysteresis loss is mainly due to alternative current which cause magnetic reversal at each cycle, the coercivity field is responsible for this. Joule's heating is also a factor in transformers.

Manish said:   8 years ago
Copper windings has some resistance, current goes through the copper winding, resistance oppose the alternating current, so some heat are produce.

Emmanuel said:   9 years ago
A transformer is an electrical device for changing the size of an AC voltage. They are used to increase or decrease the emf of an alternating current.

Suba said:   9 years ago
What is transformer where they used?

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