Physics help please and thank you.

Question

1: The electromagnetic wave is a consequence of _______ electric and magnetic fields that move through space.

Parallel

Changing

Unchanging

None of the Above

2: The direction of an induced magnetic field is always at ____ degrees to a changing electric field.

0 degrees

45 degrees

90 degrees

180 degrees

3: Energy found on the electromagnetic spectrum with a wavelength shorter than UV that provides doctors a useful tool for the analysis of bone structure is:

Radio waves

Microwaves

Gamma Rays

X-Rays

4: Who postulated the idea that a changing electric field produces a changing magnetic field?

Ampere

Maxwell

Faraday

Gauss

Answer 1

2. 90 degrees

3.x-rays

4.faraday

1.perpendicular

Answer 2

changing - 90 - X rays - and i believe it was Maxwell !