Q.

Which is the most commonly used low voltage switching regulators?

A. powdered permalloy toroids
B. fermite ei, u and toroid cores
C. silicon steel ei butt stacks
D. none of the mentioned
Answer» C. silicon steel ei butt stacks
Explanation: the silicon steel ei butt stack exhibits high permeability high flux density and ease of construction and mounting therefore, it is most commonly used in low voltage switching regulators.
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