What effect will be produced on the body if it is deprived of blood?
What effect on the digestive process has the restriction of the ribs and diaphragm?
What effect on the system when the secretions are not regularly maintained?
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "what effect" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.