A. frequency
B. area of the core
C. flux density of the core material
D. (A) and (B) both
Answer: D
Explanation:
B. area of the core
C. flux density of the core material
D. (A) and (B) both
Answer: D
Explanation:
- The size of the transformer will depend on the frequency and area of the core.
- The area of the window and cross sectional area of the limb are the main dimensions of a transformer, the product of which is directly proportional to the size and weight of the transformer. More the product (area), bigger and heavier is the transformer.
- For a given transformer rating, as the frequency increases the product of window area and cross sectional area of the limb decreases; which means the iron required for the core decreases. Therefore as the frequency increases, the transformer becomes lighter and smaller in size.
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