Which of the following is not true of electromagnetic waves? a. an electric field is created in any region of space in which a magnetic field is changing with time. b. a magnetic field is created in any region of space in which an electric field is changing with time. c. induction of electric fields by changing magnetic fields occurs only if a conducting material is present. d. induction of magnetic fields by changing magnetic fields occurs even in the absence of a conducting material. reset selection

The incorrect statement about electromagnetic waves is C. induction of electric fields by changing magnetic fields only occurs if a conducting material is present.
Electromagnetic waves do not rely on any medium for propagation, which means that the generation of fields is irrespective of the presence of a conducting material. 

Iwould say a is accurate

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