There are many reasons why it is necessary for induction to occur. One very important reason is transferring of heat.
No.
For electromagnetic induction, you need a conductor moving in a magnetic field.
Isolation Is necessary for speciation to occur.
Water, sunlight, carbon dioxide and chlorophyll are necessary for photosynthesis to occur.
Yup
Photosynthesis requires sunlight, water, and carbon dioxide to occur.
A starter is unnecessary because the stator produces a rotating magnetic field.
It is not "necessary" for oscillation to occur in any "arbitrary" circuit. It depends on the design objectives. Please be more specific, and restate the question.
Estrogen
a light source and a reflector
trf cannot work on dc. the primary flux must vary for induction to occur in the secondary winding. howlunf
learn in school dumbys