A chopper operating at a fixed frequency is feeding an R-L

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A chopper operating at a fixed frequency is feeding an R-L load. As duty ratio of the chopper is increased from 25% to 75%, the ripple in the load current

1. remains constant
2. decreases, reaches a minimum at 50% duty ratio and then increases
3. increases, reaches a maximum at 50% duty ratio and then decreases
4. keeps on increasing as the duty ratio is increased

Correct Option: A

NA