The purpose of providing iron core in a step-up transformer is?
Correct answer: D. to provide all above features
- A. to provide coupling between primary and secondary
- B. to increase the magnitude of mutual flux
- C. to decrease the magnitude of mag-netizing current
- D. to provide all above features
Explanation
The iron core provides a low-reluctance path that links the primary and secondary, increases mutual flux, and reduces the magnetizing current needed to establish that flux. Thus all three listed functions are provided by the core.
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